Compilation fix for DEFINE_GUID uses.

DEFINE_GUID doesn't define the value, only declares an external
variable, unless initguid.h was included. This leads to linker errors.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@67573 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/msw/textentry.cpp

@@ -34,6 +34,8 @@
 #include "wx/textcompleter.h"
 #include "wx/dynlib.h"
 
+#include <initguid.h>
+
 #include "wx/msw/private.h"
 
 #if wxUSE_UXTHEME