[gtk-vnc] Add missing include of gdkwin32.h

[Daniel P. Berrange <dberrange src gnome org>]

commit d2c93a2bc0a9caa73bbebb41333fa7930d4165ab
Author: Daniel P. Berrangé <dan berrange com>
Date:   Tue Mar 30 15:00:00 2021 +0100

    Add missing include of gdkwin32.h
    
    This is needed for GDK_IS_WIN32_DISPLAY. This bug was masked until
    
      commit 78225889ce861c0d3ea4aa97603fef252817505f
      Author: Marc-André Lureau <marcandre lureau gmail com>
      Date:   Wed Mar 24 12:45:27 2021 +0400
    
        Cleanup Gtk2 leftovers
    
    Signed-off-by: Daniel P. Berrangé <berrange redhat com>

 src/vncdisplaykeymap.c | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/src/vncdisplaykeymap.c b/src/vncdisplaykeymap.c
index c964884..9c029af 100644
--- a/src/vncdisplaykeymap.c
+++ b/src/vncdisplaykeymap.c
@@ -57,6 +57,7 @@
 #endif
 
 #ifdef GDK_WINDOWING_WIN32
+#include <gdk/gdkwin32.h>
 /* Win32 native virtual keycodes */
 #include "vncdisplaykeymap_win322qnum.h"
 #endif