Fix crash if there are no grabs in place.

2018-11-26 09:51:36 +09:00
parent e786da9ca9
commit 5294c4f6f3
1 changed files with 5 additions and 0 deletions
--- a/gdk/gdkdisplay.c
+++ b/gdk/gdkdisplay.c
@@ -1318,6 +1318,11 @@ _gdk_display_check_grab_ownership (GdkDisplay *display,
  GdkGrabOwnership higher_ownership, device_ownership;
  gboolean device_is_keyboard;

+  g_return_val_if_fail (display, TRUE);
+
+  if (!display->device_grabs)
+    return TRUE; /* No hash table, no grabs. */
+
  g_hash_table_iter_init (&iter, display->device_grabs);
  higher_ownership = device_ownership = GDK_OWNERSHIP_NONE;
  device_is_keyboard = (gdk_device_get_source (device) == GDK_SOURCE_KEYBOARD);