Merge "Only pass strings to mysqli::real_escape_string"

diff --combined includes/db/DatabaseMysqli.php
index e202f8a,290de1f..7c25d5a
--- 1/includes/db/DatabaseMysqli.php
--- 2/includes/db/DatabaseMysqli.php
+++ b/includes/db/DatabaseMysqli.php
@@@ -244,7 -244,6 +244,7 @@@ class DatabaseMysqli extends DatabaseMy
         */
        protected function mysqlFieldType( $res, $n ) {
                $field = $res->fetch_field_direct( $n );
 +
                return $field->type;
        }
  
@@@ -275,6 -274,10 +275,10 @@@
         * @return string
         */
        protected function mysqlRealEscapeString( $s ) {
+               if ( is_integer( $s ) ) {
+                       // HHVM fatals passing numbers to real_escape_string
+                       $s = (string) $s;
+               }
                return $this->mConn->real_escape_string( $s );
        }