adding default for Create with dc

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@74297 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/os2/bitmap.h

@@ -166,6 +166,8 @@ public:
                        );
     virtual bool Create(const wxSize& sz, int depth = wxBITMAP_SCREEN_DEPTH)
         { return Create(sz.GetWidth(), sz.GetHeight(), depth); }
+    virtual bool Create(int width, int height, const wxDC& WXUNUSED(dc))
+        { return Create(width,height); }
 
     virtual bool Create( const void* pData
                         ,wxBitmapType lType