Merge pull request #35 from bluesandnz/master

typo .. additonal parenthesis

kamailio/registrar-role.cfg

@@ -76,7 +76,7 @@ route[ATTEMPT_AUTHORIZATION]
     $xavp(regcfg=>match_received) = $su;
     $xavp(regcfg[0]=>match_contact) = $(ct{nameaddr.uri});
 
-    if ($sht(auth_cache=>$Au) != $null && registered("location", "$rz:$Au", 6) == 1)) {
+    if ($sht(auth_cache=>$Au) != $null && registered("location", "$rz:$Au", 6) == 1) {
         xlog("L_INFO", "$ci|log|authenticating $fu via cached SIP creds");
         $var(password) = $sht(auth_cache=>$Au);
     } else {