From f6305db0c3662d8a360a90c26ecadbba986d8e42 Mon Sep 17 00:00:00 2001
From: Anthony Minessale <anthony.minessale@gmail.com>
Date: Tue, 11 Mar 2008 23:49:06 +0000
Subject: [PATCH] update

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@7869 d0543943-73ff-0310-b7d9-9358b9ac24b2
---
 src/switch_channel.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/switch_channel.c b/src/switch_channel.c
index 98e5200ff6..caba6823fb 100644
--- a/src/switch_channel.c
+++ b/src/switch_channel.c
@@ -1561,6 +1561,10 @@ SWITCH_DECLARE(char *) switch_channel_expand_variables(switch_channel_t *channel
 	char *func_val = NULL;
 	int nv = 0;
 
+	if (switch_strlen_zero(in)) {
+		return (char *)in;
+	}
+
 	q = in;
 	while(q && *q) {
 		if (!(p = strchr(q, '$'))) {