Remove "safety margin" from wxControl::Ellipsize().

When ellipsizing kicks in, the text is much shorter than the available
space -- there's a "safety margin" of one character's width that is
always left unused. This appears to be some kludge that worked around
algorithm defects, not something that should really be needed.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@66870 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/control.h

@@ -168,7 +168,7 @@ protected:
     // Ellipsize() helper:
     static wxString DoEllipsizeSingleLine(const wxString& label, const wxDC& dc,
                                           wxEllipsizeMode mode, int maxWidth,
-                                          int replacementWidth, int marginWidth);
+                                          int replacementWidth);
 
     // this field contains the label in wx format, i.e. with '&' mnemonics,
     // as it was passed to the last SetLabel() call