Added geometry.cpp and made it compile,

Added empty dndcmn.cpp to avoid GNU link warnings,
  Fixed problem with event.Skip() in new tab code.


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@5625 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/dnd.h

@@ -12,6 +12,10 @@
 #ifndef _WX_DND_H_BASE_
 #define _WX_DND_H_BASE_
 
+#ifdef __GNUG__
+    #pragma interface "dndbase.h"
+#endif
+
 #include "wx/defs.h"
 
 #if wxUSE_DRAG_AND_DROP