Fix potential NULL pointer dereference on NS

* src/nsterm.m (ns_mouse_position): Don't test f's tooltip-ness
if it's NULL.

diff --git a/src/nsterm.m b/src/nsterm.m
index 9a23efe3ac1eba3ef3e55bc1ad752f591048a3a1..b7b7bc2ad34924f494863e2447fda20f60487e73 100644 (file)
--- a/src/nsterm.m
+++ b/src/nsterm.m
@@ -2365,7 +2365,7 @@ ns_mouse_position (struct frame **fp, int insist, Lisp_Object *bar_window,
   if (!FRAME_NS_P (f))
     f = NULL;
 
-  if (FRAME_TOOLTIP_P (f))
+  if (f && FRAME_TOOLTIP_P (f))
     f = dpyinfo->last_mouse_frame;
 
   /* While dropping, use the last mouse frame only if there is no