gdkdragsource: Ensure button >= 1

So the left shift later doesn't overflow.
2017-03-21 16:06:13 +01:00
parent 92fd8cb81b
commit 6f30e97c3d
1 changed files with 2 additions and 0 deletions
--- a/gtk/gtkdragsource.c
+++ b/gtk/gtkdragsource.c
@ -58,6 +58,8 @@ gtk_drag_source_gesture_begin (GtkGesture       *gesture,
  else
    button = gtk_gesture_single_get_current_button (GTK_GESTURE_SINGLE (gesture));

+  g_assert (button >= 1);
+
  if (!site->start_button_mask ||
      !(site->start_button_mask & (GDK_BUTTON1_MASK << (button - 1))))
    gtk_gesture_set_state (gesture, GTK_EVENT_SEQUENCE_DENIED);