TST: Fixed precision test error for read_csv
This should hopefully fix #8324.
@jreback 

let me try
 didn't fix. If want to setup a windows build, be my guest (though its a bit of a PITA): https://github.com/pydata/pandas/wiki/Building-On-Windows

Could skip on windows / change the check as well.
 To me this is really strange, as I can't think of the reason why the converters should be at all platform-dependent (probably the same issue as in #8044). For the moment I amended this commit to a `<=` check, does this work for you?
 sure that's fine

windows is just odd
it might be that a comparison is actually a float32 (rather than a float64) 
 closed by https://github.com/pydata/pandas/commit/0005e0f78e6086b544257648c96e476708d7c3e1

just stuck it in, thanks !
