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/common/fs_mem.cpp

@@ -174,7 +174,7 @@ bool wxMemoryFSHandler::CheckHash(const wxString& filename)
 
 /*static*/ void wxMemoryFSHandler::AddFile(const wxString& filename, const wxBitmap& bitmap, long type)
 {
-    wxImage img(bitmap);
+    wxImage img = bitmap.ConvertToImage();
     AddFile(filename, img, type);
 }