silence gcc 4.2 compiler warning

git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.6.1@308725 65c4cc65-6c06-0410-ace0-fbb531ad65f3

main/udptl.c

@@ -322,9 +322,9 @@ static int udptl_rx_packet(struct ast_udptl *s, uint8_t *buf, unsigned int len)
 	unsigned int count;
 	int total_count;
 	int seq_no;
-	const uint8_t *ifp;
-	const uint8_t *data;
-	unsigned int ifp_len;
+	const uint8_t *ifp = NULL;
+	const uint8_t *data = NULL;
+	unsigned int ifp_len = 0;
 	int repaired[16];
 	const uint8_t *bufs[ARRAY_LEN(s->f) - 1];
 	unsigned int lengths[ARRAY_LEN(s->f) - 1];