#if fix so we don't end up using the generic header on wxMac

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@29128 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/dirdlg.h

@@ -43,11 +43,11 @@ public:
 */
 
 // Universal and non-port related switches with need for generic implementation
-#if defined(__WXUNIVERSAL__) || \
-    defined(__WXWINCE__)     || \
-    defined(__SALFORDC__)    || \
-    !wxUSE_OLE               || \
-    (defined (__GNUWIN32__) && !wxUSE_NORLANDER_HEADERS)
+#if defined(__WXMSW__) && (defined(__WXUNIVERSAL__) || \
+                           defined(__WXWINCE__)     || \
+                           defined(__SALFORDC__)    || \
+                           !wxUSE_OLE               || \
+                           (defined (__GNUWIN32__) && !wxUSE_NORLANDER_HEADERS))
 
     #include "wx/generic/dirdlgg.h"
     #define wxDirDialog wxGenericDirDialog