[mutter] display: Cleanup Edges when display is closed

[Marco Trevisan <marcotrevi src gnome org>]

commit 85c2aef4bc34aceb295b4c64b31f1aec3fffdd11
Author: Marco Trevisan (Treviño) <mail 3v1n0 net>
Date:   Thu May 16 15:59:41 2019 -0500

    display: Cleanup Edges when display is closed
    
    This could happen if closing the display when dragging a window, unlikely, but
    better to use the cleanup function since we have it.
    
    https://gitlab.gnome.org/GNOME/mutter/merge_requests/581

 src/core/display.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/src/core/display.c b/src/core/display.c
index 1f352d5f2..ae5bc2caf 100644
--- a/src/core/display.c
+++ b/src/core/display.c
@@ -725,7 +725,7 @@ meta_display_open (void)
   display->grab_tile_mode = META_TILE_NONE;
   display->grab_tile_monitor_number = -1;
 
-  display->grab_edge_resistance_data = NULL;
+  meta_display_cleanup_edges (display);
 
   meta_display_init_keys (display);