mingw32 compilation fixes

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@4516 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

diff --git a/include/wx/msw/dib.h b/include/wx/msw/dib.h
index 1e19b76b6c9ba1577d305fbbdb9bb38fcf35f4a9..2944272aaf201b0daabf1a6c4fbaf5b4d1238a1c 100644 (file)
--- a/include/wx/msw/dib.h
+++ b/include/wx/msw/dib.h
@@ -12,6 +12,9 @@
 #ifndef _WX_DIB_H_
 #define _WX_DIB_H_
 
+class WXDLLEXPORT wxBitmap;
+class WXDLLEXPORT wxColourMap;
+
 // Save (device dependent) wxBitmap as a DIB
 bool             wxSaveBitmap(wxChar *filename, wxBitmap *bitmap, wxColourMap *colourmap = NULL);