BLD: Fixed pointer ambiguity in 'tokenizer.c'
- [x] closes build compatibility issue #13863 
- [x] tests added / passed (see notes)
- [x] passes `git diff upstream/master | flake8 --diff`
- [x] whatsnew entry (No whatsnew entry was necessary)
## notes

The branch was tested on win7 64bit virtual machine with anaconda 4.1.1 both with python 2.7 (VS2008) and with python 3.5 (VS2015). Running **test.bat** returned this  on each platform:
### python 2.7

```
======================================================================
FAIL: test_constructor_bad_file (pandas.io.tests.test_common.TestMMapWrapper)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "C:\Users\vmuser\pandas\pandas\io\tests\test_common.py", line 110, in tes
t_constructor_bad_file
    tm.assertRaisesRegexp(err, msg, common.MMapWrapper, non_file)
  File "C:\Users\vmuser\pandas\pandas\util\testing.py", line 2373, in assertRais
esRegexp
    _callable(*args, **kwargs)
  File "C:\Users\vmuser\pandas\pandas\util\testing.py", line 2398, in __exit__
    return self.handle_success(exc_type, exc_value, traceback)
  File "C:\Users\vmuser\pandas\pandas\util\testing.py", line 2411, in handle_suc
cess
    raise_with_traceback(e, traceback)
  File "C:\Users\vmuser\pandas\pandas\util\testing.py", line 2373, in assertRais
esRegexp
    _callable(*args, **kwargs)
  File "C:\Users\vmuser\pandas\pandas\io\common.py", line 355, in __init__
    self.mmap = mmap.mmap(f.fileno(), 0, access=mmap.ACCESS_READ)
AssertionError: "The parameter is incorrect" does not match "[Error 87] "

----------------------------------------------------------------------
Ran 10634 tests in 494.796s

FAILED (SKIP=148, failures=1)
```

**pd.show_versions()**

```
INSTALLED VERSIONS
------------------
commit: 3b0e28e255c0319bc19397e07493bb92b4190d53
python: 2.7.12.final.0
python-bits: 64
OS: Windows
OS-release: 7
machine: AMD64
processor: Intel64 Family 6 Model 42 Stepping 7, GenuineIntel
byteorder: little
LC_ALL: None
LANG: None
LOCALE: None.None

pandas: 0.18.1+291.g3b0e28e
nose: 1.3.7
pip: 8.1.2
setuptools: 23.0.0
Cython: 0.24
numpy: 1.11.1
scipy: 0.17.1
statsmodels: 0.6.1
xarray: None
IPython: 4.2.0
sphinx: 1.4.1
patsy: 0.4.1
dateutil: 2.5.3
pytz: 2016.4
blosc: None
bottleneck: 1.1.0
tables: 3.2.2
numexpr: 2.6.0
matplotlib: 1.5.1
openpyxl: 2.3.2
xlrd: 1.0.0
xlwt: 1.1.2
xlsxwriter: 0.9.2
lxml: 3.6.0
bs4: 4.4.1
html5lib: None
httplib2: None
apiclient: None
sqlalchemy: 1.0.13
pymysql: None
psycopg2: None
jinja2: 2.8
boto: 2.40.0
pandas_datareader: None
```
### python 3.5

```
======================================================================
ERROR: test_to_latex_filename (pandas.tests.formats.test_format.TestDataFrameFor
matting)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "C:\Users\vmuser\pandas\pandas\tests\formats\test_format.py", line 2800,
in test_to_latex_filename
    df.to_latex(path)
  File "C:\Users\vmuser\pandas\pandas\core\frame.py", line 1666, in to_latex
    encoding=encoding)
  File "C:\Users\vmuser\pandas\pandas\formats\format.py", line 658, in to_latex
    latex_renderer.write_result(f)
  File "C:\Users\vmuser\pandas\pandas\formats\format.py", line 894, in write_res
ult
    buf.write(' & '.join(crow))
  File "C:\Anaconda2\envs\py35\lib\encodings\cp1251.py", line 19, in encode
    return codecs.charmap_encode(input,self.errors,encoding_table)[0]
UnicodeEncodeError: 'charmap' codec can't encode character '\xdf' in position 7:
 character maps to <undefined>

======================================================================
FAIL: test_constructor_bad_file (pandas.io.tests.test_common.TestMMapWrapper)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "C:\Users\vmuser\pandas\pandas\util\testing.py", line 2373, in assertRais
esRegexp
    _callable(*args, **kwargs)
  File "C:\Users\vmuser\pandas\pandas\io\common.py", line 355, in __init__
    self.mmap = mmap.mmap(f.fileno(), 0, access=mmap.ACCESS_READ)
OSError: [WinError 87] Параметр задан неверно

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "C:\Users\vmuser\pandas\pandas\io\tests\test_common.py", line 110, in tes
t_constructor_bad_file
    tm.assertRaisesRegexp(err, msg, common.MMapWrapper, non_file)
  File "C:\Users\vmuser\pandas\pandas\util\testing.py", line 2373, in assertRais
esRegexp
    _callable(*args, **kwargs)
  File "C:\Users\vmuser\pandas\pandas\util\testing.py", line 2398, in __exit__
    return self.handle_success(exc_type, exc_value, traceback)
  File "C:\Users\vmuser\pandas\pandas\util\testing.py", line 2411, in handle_suc
cess
    raise_with_traceback(e, traceback)
  File "C:\Users\vmuser\pandas\pandas\compat\__init__.py", line 333, in raise_wi
th_traceback
    raise exc.with_traceback(traceback)
  File "C:\Users\vmuser\pandas\pandas\util\testing.py", line 2373, in assertRais
esRegexp
    _callable(*args, **kwargs)
  File "C:\Users\vmuser\pandas\pandas\io\common.py", line 355, in __init__
    self.mmap = mmap.mmap(f.fileno(), 0, access=mmap.ACCESS_READ)
AssertionError: "The parameter is incorrect" does not match "[WinError 87] Параметр задан неверно"

----------------------------------------------------------------------
Ran 10634 tests in 437.328s

FAILED (SKIP=146, errors=1, failures=1)
```

**pd.show_versions()**

```
INSTALLED VERSIONS
------------------
commit: 3b0e28e255c0319bc19397e07493bb92b4190d53
python: 3.5.2.final.0
python-bits: 64
OS: Windows
OS-release: 7
machine: AMD64
processor: Intel64 Family 6 Model 42 Stepping 7, GenuineIntel
byteorder: little
LC_ALL: None
LANG: None
LOCALE: None.None

pandas: 0.18.1+291.g3b0e28e
nose: 1.3.7
pip: 8.1.2
setuptools: 23.0.0
Cython: 0.24
numpy: 1.11.1
scipy: 0.17.1
statsmodels: 0.6.1
xarray: None
IPython: 4.2.0
sphinx: 1.3.1
patsy: 0.4.1
dateutil: 2.5.3
pytz: 2016.4
blosc: None
bottleneck: 1.1.0
tables: 3.2.2
numexpr: 2.6.0
matplotlib: 1.5.1
openpyxl: 2.3.2
xlrd: 1.0.0
xlwt: 1.1.2
xlsxwriter: 0.9.2
lxml: 3.6.0
bs4: 4.4.1
html5lib: None
httplib2: None
apiclient: None
sqlalchemy: 1.0.13
pymysql: None
psycopg2: None
jinja2: 2.8
boto: 2.40.0
pandas_datareader: None
```

hmm, you shouldn't be getting _any_ failing tests, these looks like locale issues.  (note these are windows specific and not tested on Travis I think)

@gfyoung ?
 @ivannz if you want to create an appveyor account then it will run the tests there as well (using pandas config). its free :>
 @jreback : Agreed.  These appear to be locale issues.  Let Travis run! :)
 Here is a link to Travis CI build results in my [repo](https://travis-ci.org/ivannz/pandas/builds/148699247).
 ## [Current coverage](https://codecov.io/gh/pydata/pandas/pull/13865?src=pr) is 85.25% (diff: 100%)

> Merging [#13865](https://codecov.io/gh/pydata/pandas/pull/13865?src=pr) into [master](https://codecov.io/gh/pydata/pandas/branch/master?src=pr) will not change coverage

``` diff
@@             master     #13865   diff @@
==========================================
  Files           140        140          
  Lines         50455      50455          
  Methods           0          0          
  Messages          0          0          
  Branches          0          0          
==========================================
  Hits          43014      43014          
  Misses         7441       7441          
  Partials          0          0          
```

> Powered by [Codecov](https://codecov.io?src=pr). Last update [59f2557...3b0e28e](https://codecov.io/gh/pydata/pandas/compare/59f25575f42e19f066dc3cd2245983071e2d7813...3b0e28e255c0319bc19397e07493bb92b4190d53?src=pr)
 thanks @ivannz this seems to have done the trick.

for those other failing tests you are getting, if you'd create a repro and file an issue would be great.
