don't do anything before including the PCH header

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@48862 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/generic/scrlwing.cpp

@@ -18,10 +18,6 @@
 // headers
 // ----------------------------------------------------------------------------
 
-#ifdef __VMS
-#define XtDisplay XTDISPLAY
-#endif
-
 // For compilers that support precompilation, includes "wx.h".
 #include "wx/wxprec.h"
 
@@ -29,6 +25,10 @@
     #pragma hdrstop
 #endif
 
+#ifdef __VMS
+#define XtDisplay XTDISPLAY
+#endif
+
 #include "wx/scrolwin.h"
 
 #ifndef WX_PRECOMP