Include wx/hash.h according to precompiled headers of wx/wx.h (with other minor cleaning).

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@38868 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/x11/window.cpp

@@ -13,7 +13,11 @@
 #include "wx/wxprec.h"
 
 #if defined(__BORLANDC__)
-#pragma hdrstop
+    #pragma hdrstop
+#endif
+
+#ifndef WX_PRECOMP
+    #include "wx/hash.h"
 #endif
 
 // ============================================================================
@@ -44,7 +48,6 @@
 #include "wx/log.h"
 #include "wx/fontutil.h"
 #include "wx/univ/renderer.h"
-#include "wx/hash.h"
 
 #if  wxUSE_DRAG_AND_DROP
     #include "wx/dnd.h"