doctrine/dbal — pull request #386 by deeky666 (2013-10-09 16:25:21+00:00)
Title: Fix Index construction

This PR fixes an uncommon but possible use case where an `Index` is constructed with an empty columns array. Following calls to `Index::getColumns()` lead to a PHP warning `array_keys() expects parameter 1 to be array, null given` as the `$_columns` property is not properly initialized.