jmls pointed out that unsetting the group and setting the group to the blank string aren't quite the same.

git-svn-id: http://svn.digium.com/svn/asterisk/branches/1.4@83773 f38db490-d61c-443f-a65b-d21fe96a405b

1 files changed, 4 insertions, 2 deletions

diff --git a/main/app.c b/main/app.c
index d65ff53f7..c84bd0f54 100644
--- a/main/app.c
+++ b/main/app.c
@@ -814,8 +814,10 @@ int ast_app_group_set_channel(struct ast_channel *chan, const char *data)
 		}
 	}
 	AST_LIST_TRAVERSE_SAFE_END
-	
-	if ((gi = calloc(1, len))) {
+
+	if (ast_strlen_zero(group)) {
+		/* Enable unsetting the group */
+	} else if ((gi = calloc(1, len))) {
 		gi->chan = chan;
 		gi->group = (char *) gi + sizeof(*gi);
 		strcpy(gi->group, group);