Setup fromuser properly (bug #2802)

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@4169 65c4cc65-6c06-0410-ace0-fbb531ad65f3

channels/chan_sip.c

@@ -4055,6 +4055,7 @@ static int transmit_register(struct sip_registry *r, char *cmd, char *auth, char
 			if (!ast_strlen_zero(r->username)) {
 				strncpy(p->peername, r->username, sizeof(p->peername)-1);
 				strncpy(p->authname, r->username, sizeof(p->authname)-1);
+				strncpy(p->fromuser, r->username, sizeof(p->fromuser)-1);
 			}
 		}
 		if (!ast_strlen_zero(r->username))