Don't attempt free of NULL ptr in pbx.c handle_presencechange

(closes issue AST-921)
Reported by: Guenther Kelleter
Patches:
    nullptr.patch uploaded by Guenther Kelleter (license 6372)

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@370466 65c4cc65-6c06-0410-ace0-fbb531ad65f3

diff --git a/main/pbx.c b/main/pbx.c
index a1ed1b5..0e0c6f3 100644 (file)
--- a/main/pbx.c
+++ b/main/pbx.c
@@ -4820,7 +4820,7 @@ static int handle_presencechange(void *datap)
        res = 0;
 
 presencechange_cleanup:
-       ast_free(hint_app);
+       ast_ref(hint_app, -1);
        ao2_ref(pc, -1);
 
        return res;