title: wxPython StyledTextCtrl line numbers not starting at 1
body: <p>I know how to add line numbers to a wxPython StyledTextCtrl, thanks to the wxPython Demos.</p>
  
  <pre><code>myctrl.SetMarginType(0, wx.stc.STC_MARGIN_NUMBER)
  </code></pre>
  
  <p>Is there a way to make the line numbering start at something other than 1?</p>
  
  <p>The motivation for this is to show snippets of a large text file.  I want the line numbers to match those in the complete file, but I don't want to load the entire file in my text control.</p>