warnings for mingw32 compilation fixed

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@3970 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/generic/dirdlgg.cpp

@@ -50,6 +50,7 @@
 #undef GetFirstChild
 #endif
 
+#ifndef __WXMSW__
 /* XPM */
 static char * icon1_xpm[] = {
 /* width height ncolors chars_per_pixel */
@@ -108,6 +109,8 @@ static char * icon2_xpm[] = {
 "                ",
 "                "};
 
+#endif // !wxMSW
+
 static const int ID_DIRCTRL = 1000;
 static const int ID_TEXTCTRL = 1001;
 static const int ID_OK = 1002;