Don't use X11-only functions when not using X11 in wxGTK.

See #16688.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@78161 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/gtk/window.cpp

@@ -849,6 +849,8 @@ wxTranslateGTKKeyEventToWx(wxKeyEvent& event,
             }
 
 #ifdef GDK_WINDOWING_X11
+            if (GDK_IS_X11_DISPLAY(gdk_window_get_display(gdk_event->window)))
+            {
                 // we want to always get the same key code when the same key is
                 // pressed regardless of the state of the modifiers, i.e. on a
                 // standard US keyboard pressing '5' or '%' ('5' key with
@@ -871,6 +873,7 @@ wxTranslateGTKKeyEventToWx(wxKeyEvent& event,
                 // use the normalized, i.e. lower register, keysym if we've
                 // got one
                 key_code = keysymNormalized ? keysymNormalized : keysym;
+            }
 #else
             key_code = keysym;
 #endif