Include locale.h in cmdline.cpp to ensure LC_ALL is defined.

This is needed for at least VC++ 6 and is more correct anyhow.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@64521 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/common/cmdline.cpp

@@ -37,6 +37,7 @@
 #if wxUSE_CMDLINE_PARSER
 
 #include <ctype.h>
+#include <locale.h>             // for LC_ALL
 
 #include "wx/datetime.h"
 #include "wx/msgout.h"