From fa39cc9fbe04a521d7a710f736b9a4e894e43248 Mon Sep 17 00:00:00 2001
From: Richard Fuchs <rfuchs@sipwise.com>
Date: Tue, 8 Jan 2013 20:01:04 +0000
Subject: [PATCH] fix possible segfault in empty-string case

---
 modules_k/pv/pv_trans.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/modules_k/pv/pv_trans.c b/modules_k/pv/pv_trans.c
index d127e765a..1d05aac54 100644
--- a/modules_k/pv/pv_trans.c
+++ b/modules_k/pv/pv_trans.c
@@ -384,7 +384,7 @@ int tr_eval_string(struct sip_msg *msg, tr_param_t *tp, int subtype,
 					val->rs.s = p+1;
 					val->rs.len = s-p;
 				} else {
-					val->rs.s = "";
+					val->rs.s = val->rs.s + val->rs.len; /* empty string */
 					val->rs.len = 0;
 				}
 			} else {
@@ -406,7 +406,7 @@ int tr_eval_string(struct sip_msg *msg, tr_param_t *tp, int subtype,
 					val->rs.s = s;
 					val->rs.len = p-s;
 				} else {
-					val->rs.s = "";
+					val->rs.s = val->rs.s + val->rs.len; /* empty string */
 					val->rs.len = 0;
 				}
 			}