notebook: Fix crash when dragging a tab

gtk_gesture_get_last_event can return NULL, so guard against that.

diff --git a/gtk/gtknotebook.c b/gtk/gtknotebook.c
index e9223e0996899b4d513ed4428a835df798175c6f..9073f81b14ca6131505b1f567754c7da22957925 100644 (file)
--- a/gtk/gtknotebook.c
+++ b/gtk/gtknotebook.c
@@ -2786,6 +2786,9 @@ gtk_notebook_gesture_released (GtkGestureMultiPress *gesture,
   button = gtk_gesture_single_get_current_button (GTK_GESTURE_SINGLE (gesture));
   event = gtk_gesture_get_last_event (GTK_GESTURE (gesture), sequence);
 
+  if (!event)
+    return;
+
   if (event->type != GDK_BUTTON_RELEASE)
     return;