Improve safeGetLag() return docs

Change-Id: I7b2d0d96901412abe8bdf9abee39e6d545c94644

diff --git a/includes/db/loadbalancer/LoadBalancer.php b/includes/db/loadbalancer/LoadBalancer.php
index fc7fa13..b029a1d 100644 (file)
--- a/includes/db/loadbalancer/LoadBalancer.php
+++ b/includes/db/loadbalancer/LoadBalancer.php
@@ -1364,7 +1364,7 @@ class LoadBalancer {
         * case on many installations.
         *
         * @param IDatabase $conn
-        * @return int
+        * @return int|bool Returns false on error
         */
        public function safeGetLag( IDatabase $conn ) {
                if ( $this->getServerCount() == 1 ) {