prevent possible seg fault (issue #5502)

git-svn-id: http://svn.digium.com/svn/asterisk/branches/v1-0@6919 f38db490-d61c-443f-a65b-d21fe96a405b

1 files changed, 1 insertions, 1 deletions

diff --git a/rtp.c b/rtp.c
index 79799fac9..c069b85bb 100755
--- a/rtp.c
+++ b/rtp.c
@@ -342,7 +342,7 @@ struct ast_frame *ast_rtcp_read(struct ast_rtp *rtp)
 	unsigned int rtcpdata[1024];
 	char iabuf[INET_ADDRSTRLEN];
 	
-	if (!rtp->rtcp)
+	if (!rtp || !rtp->rtcp)
 		return &null_frame;
 
 	len = sizeof(sin);