Remove unnecessary header dependencies. Fix resulting compilation

problems for wxMSW, wxGTK, wxMotif, wxX11 and wxMac in default
configuration. Non-default configurations will probably need some more
fixes.


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@19172 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/motif/window.cpp

@@ -46,6 +46,7 @@
 #include "wx/menuitem.h"
 #include "wx/log.h"
 #include "wx/evtloop.h"
+#include "wx/hash.h"
 
 #if  wxUSE_DRAG_AND_DROP
     #include "wx/dnd.h"