Return false for corrupted serialized strings. props Denis-de-Bernardy. fixes #9549

git-svn-id: https://develop.svn.wordpress.org/trunk@10955 602fd350-edb4-49c9-b593-d223f7449a82

wp-includes/functions.php

@@ -226,8 +226,7 @@ function get_weekstartend( $mysqlstring, $start_of_week = '' ) {
  */
 function maybe_unserialize( $original ) {
 	if ( is_serialized( $original ) ) // don't attempt to unserialize data that wasn't serialized going in
-		if ( false !== $gm = @unserialize( $original ) )
-			return $gm;
+		return @unserialize( $original );
 	return $original;
 }