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

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@40345 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/msw/clipbrd.cpp

@@ -37,6 +37,7 @@
     #include "wx/utils.h"
     #include "wx/intl.h"
     #include "wx/log.h"
+    #include "wx/dataobj.h"
 #endif
 
 #if wxUSE_METAFILE
@@ -57,10 +58,6 @@
 // the functions using wxDataObject in wxClipboard
 //#define wxUSE_DATAOBJ wxUSE_DRAG_AND_DROP
 
-#if wxUSE_DATAOBJ
-    #include "wx/dataobj.h"
-#endif
-
 #if wxUSE_OLE && !defined(__WXWINCE__)
     // use OLE clipboard
     #define wxUSE_OLE_CLIPBOARD 1