[gtk/inspector-menu-fix: 1/4] seat: Add a sanity check

[Matthias Clasen <matthiasc src gnome org>]

commit 6f0b47681b877c0f2ea6e635ff600af30f99d24a
Author: Matthias Clasen <mclasen redhat com>
Date:   Wed May 1 20:46:02 2019 +0000

    seat: Add a sanity check
    
    apis that takes multiple display-relative objects
    should make sure that they are all from the same
    display, or hard-to-track-down badness will happen
    later on.
    
    Add such a check for the surface and device arguments
    of gdk_seat_grab. This helped in tracking down
    critical warnings from combo boxes in the inspector.

 gdk/gdkseat.c | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/gdk/gdkseat.c b/gdk/gdkseat.c
index ee88c6c4f2..c13fbed615 100644
--- a/gdk/gdkseat.c
+++ b/gdk/gdkseat.c
@@ -293,6 +293,7 @@ gdk_seat_grab (GdkSeat                *seat,
 
   g_return_val_if_fail (GDK_IS_SEAT (seat), GDK_GRAB_FAILED);
   g_return_val_if_fail (GDK_IS_SURFACE (surface), GDK_GRAB_FAILED);
+  g_return_val_if_fail (gdk_surface_get_display (surface) == gdk_seat_get_display (seat), GDK_GRAB_FAILED);
 
   capabilities &= GDK_SEAT_CAPABILITY_ALL;
   g_return_val_if_fail (capabilities != GDK_SEAT_CAPABILITY_NONE, GDK_GRAB_FAILED);