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

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@38972 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/gtk/cursor.cpp

@@ -14,10 +14,9 @@
 
 #ifndef WX_PRECOMP
     #include "wx/app.h"
+    #include "wx/utils.h"
 #endif // WX_PRECOMP
 
-#include "wx/utils.h"
-
 #include "wx/gtk/private.h" //for idle stuff
 
 #include <gdk/gdk.h>