don't use deprecated wxImage methods inside wxWin

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@14751 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/msw/bitmap.cpp

@@ -948,7 +948,7 @@ bool wxBitmap::LoadFile(const wxString& filename, long type)
         wxImage image;
         if ( image.LoadFile( filename, type ) && image.Ok() )
         {
-            *this = image.ConvertToBitmap();
+            *this = wxBitmap(image);
 
             return TRUE;
         }
@@ -990,7 +990,7 @@ bool wxBitmap::SaveFile(const wxString& filename,
     else
     {
         // FIXME what about palette? shouldn't we use it?
-        wxImage image( *this );
+        wxImage image = ConvertToImage();
         if ( image.Ok() )
         {
             return image.SaveFile(filename, type);