res_pjsip_phoneprov_provider: fix compile breakage on AST_VECTOR

endpoint->inbound_auths was changed to a vector in 13 and I
committed the 12 patch instead of the 13 patch.

Tested-by: George Joseph
........

Merged revisions 425052 from http://svn.asterisk.org/svn/asterisk/branches/13


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@425053 65c4cc65-6c06-0410-ace0-fbb531ad65f3

res/res_pjsip_phoneprov_provider.c

@@ -258,10 +258,10 @@ static int load_endpoint(const char *id, const char *endpoint_name, struct varsh
 	}
 	snprintf(port_string, 6, "%d", pj_sockaddr_get_port(&transport->host));
 
-	if (!endpoint->inbound_auths.num) {
+	if (!AST_VECTOR_SIZE(&endpoint->inbound_auths)) {
 		return 0;
 	}
-	auth_name = endpoint->inbound_auths.names[0];
+	auth_name = AST_VECTOR_GET(&endpoint->inbound_auths, 0);
 
 	auth = ast_sorcery_retrieve_by_id(ast_sip_get_sorcery(), "auth", auth_name);
 	if (!auth) {