From 0dd2c4d160345bb4a3f3de5bf8330b44a536038c Mon Sep 17 00:00:00 2001
From: Richard Fuchs <rfuchs@sipwise.com>
Date: Thu, 10 May 2012 15:49:13 +0000
Subject: [PATCH] An empty replacement string is valid

---
 modules/dialplan/dialplan.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/modules/dialplan/dialplan.c b/modules/dialplan/dialplan.c
index 4c86778ef..cc585971b 100644
--- a/modules/dialplan/dialplan.c
+++ b/modules/dialplan/dialplan.c
@@ -267,7 +267,7 @@ static int dp_update(struct sip_msg * msg, pv_spec_t * src, pv_spec_t * dest,
 	int no_change;
 	pv_value_t val;
 
-	no_change = (dest->type == PVT_NONE) || (!repl->s) || (!repl->len);
+	no_change = (dest->type == PVT_NONE) || (!repl->s);
 
 	if (no_change)
 		goto set_attr_pvar;