Initialize *suffix_enc to NULL

Author: davidtrihy-genesys

modules/topology_hiding/th_no_dlg_logic.c

@@ -950,7 +950,7 @@ static int th_binary_encode_record_route(rr_t *record_route, rr_t **out_rr, int
 
 static char* build_encoded_thinfo_suffix(struct sip_msg* msg, str rr_set, int *suffix_len, uint16_t flags, int socket_only) {
 	uint16_t enc_len = 0;
-	char *suffix_enc, *s;
+	char *suffix_enc = NULL, *s;
     rr_t *next = NULL, *head = NULL;
 	int i, x, params_len = 0;
 	struct sip_uri ctu = { 0 };