# HG changeset patch
# User Rik <rik@octave.org>
# Date 1351622119 25200
# Node ID 3649a6012eaac53dfdee5f30343d8582cc8c59a3
# Parent  6a4e791108578b94de6c5c77f11c34f260b8591f
legend.m: Fix segmentation fault when deleting legend where plot has already been removed (Bug #37640)

* legend.m: Use ishandle to check that plot is still valid before removing listeners on it.

diff -r 6a4e79110857 -r 3649a6012eaa scripts/plot/legend.m
--- a/scripts/plot/legend.m	Fri Oct 19 08:46:06 2012 -0700
+++ b/scripts/plot/legend.m	Tue Oct 30 11:35:19 2012 -0700
@@ -886,7 +886,7 @@
   set (t1, "deletefcn", "");
   delete (t1);
   for i = 1 : numel (hplots)
-    if (strcmp (get (hplots (i), "type"), "line"))
+    if (ishandle (hplots(i)) && strcmp (get (hplots (i), "type"), "line"))
       dellistener (hplots (i), "color");
       dellistener (hplots (i), "linestyle");
       dellistener (hplots (i), "marker");