Handle masq properly when clone channel has no vars (bug 3344)

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@4796 65c4cc65-6c06-0410-ace0-fbb531ad65f3
21 years ago · 122b11ec21
parent 99e2b961c2
commit 122b11ec21
1 changed files with 2 additions and 1 deletions
--- a/channel.c
+++ b/channel.c
@ -2317,7 +2317,8 @@ static void clone_variables(struct ast_channel *original, struct ast_channel *cl

 	/* Append variables from clone channel into original channel */
 	/* XXX Is this always correct?  We have to in order to keep MACROS working XXX */
-	AST_LIST_INSERT_TAIL(&original->varshead, AST_LIST_FIRST(&clone->varshead), entries);
+	if (AST_LIST_FIRST(&clone->varshead))
+		AST_LIST_INSERT_TAIL(&original->varshead, AST_LIST_FIRST(&clone->varshead), entries);
 }

 /* Assumes channel will be locked when called */