Fix a seg fault on a registration. Line 7706, in parse_register_contact,

explicitly passes NULL as the "pass" argument to this function.


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@46055 65c4cc65-6c06-0410-ace0-fbb531ad65f3

channels/chan_sip.c

@@ -2254,9 +2254,9 @@ static int parse_uri(char *uri, char *scheme,
 	int error = 0;
 
 	/* init field as required */
-	if (*pass)
+	if (pass && *pass)
 		*pass = "";
-	if (*port)
+	if (port && *port)
 		*port = "";
 	name = strsep(&uri, ";");	/* remove options */
 	if (scheme) {