[gtk/fishbowl-crash] gdk: Fix gdk_surface_get_layout_monitor

[Matthias Clasen <matthiasc src gnome org>]

commit 5a55f6ff7b981760272861b1d67b5a7dfb2bd7ad
Author: Matthias Clasen <mclasen redhat com>
Date:   Sun Aug 2 21:27:03 2020 -0400

    gdk: Fix gdk_surface_get_layout_monitor
    
    We are determining the monitor by maximizing the
    intersection; that only works if our rectangle
    is not empty.
    
    Fixes: #3003

 gdk/gdksurface.c | 3 +++
 1 file changed, 3 insertions(+)
---
diff --git a/gdk/gdksurface.c b/gdk/gdksurface.c
index 63abe2595b..6d8b84ee34 100644
--- a/gdk/gdksurface.c
+++ b/gdk/gdksurface.c
@@ -265,6 +265,9 @@ gdk_surface_get_layout_monitor (GdkSurface      *surface,
                                &root_rect.x,
                                &root_rect.y);
 
+  root_rect.width = MAX (1, root_rect.width);
+  root_rect.height = MAX (1, root_rect.height);
+
   display = get_display_for_surface (surface, surface->transient_for);
   return get_monitor_for_rect (display, &root_rect, get_bounds);
 }