Add missing closing braces to ldap_timestamp pattern match condition

inc/drivers_ldap.php

@@ -887,7 +887,7 @@ function sync_LDAP(){
             $$k = substr($ldap_timestamp,$v[0],$v[1]);
         $ldap_timestamp = $Y.$m.$d.$H.$M.$S;
       }
-      else if ( preg_match('{^(\d{8})(\d{6})(Z)?$', $ldap_timestamp, $matches ) ) {
+      else if ( preg_match('{^(\d{8})(\d{6})(Z)?$}', $ldap_timestamp, $matches ) ) {
         $ldap_timestamp = $matches[1].'T'.$matches[2].$matches[3];
       }
       else if ( empty($ldap_timestamp) ) {