Reversed the meaning of black and white in wxRegion::ConvertToBitmap

so it matches the menaning of black and white in wxMask


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_2_4_BRANCH@20464 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/gtk1/region.h

@@ -122,7 +122,7 @@ public:
     wxRegionContain Contains(const wxPoint& pt) const;
     wxRegionContain Contains(const wxRect& rect) const;
 
-    // Convert the region to a B&W bitmap with the black pixels being inside
+    // Convert the region to a B&W bitmap with the white pixels being inside
     // the region.
     wxBitmap ConvertToBitmap() const;