Include wx/msw/wrap*.h according to pch support (with other minor cleaning).

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@41054 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/common/datetime.cpp

@@ -66,6 +66,9 @@
 #if !defined(wxUSE_DATETIME) || wxUSE_DATETIME
 
 #ifndef WX_PRECOMP
+    #ifdef __WXMSW__
+        #include "wx/msw/wrapwin.h"
+    #endif
     #include "wx/string.h"
     #include "wx/log.h"
     #include "wx/intl.h"
@@ -79,7 +82,6 @@
 #include <ctype.h>
 
 #ifdef __WINDOWS__
-    #include "wx/msw/wrapwin.h"
     #include <winnls.h>
     #ifndef __WXWINCE__
         #include <locale.h>