Remove 80 bytes in the iax2_registry struct that weren't being used

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@66957 65c4cc65-6c06-0410-ace0-fbb531ad65f3

channels/chan_iax2.c

@@ -441,7 +441,6 @@ struct iax2_registry {
 	struct sockaddr_in addr;		/*!< Who we connect to for registration purposes */
 	char username[80];
 	char secret[80];			/*!< Password or key name in []'s */
-	char random[80];
 	int expire;				/*!< Sched ID of expiration */
 	int refresh;				/*!< How often to refresh */
 	enum iax_reg_state regstate;