[2.0][DDC-249] Fixed issue that documentation refers QueryBuilder::select()...

[2.0][DDC-249] Fixed issue that documentation refers QueryBuilder::select() supports array, but it was only restricted to strings.

lib/Doctrine/ORM/Query/Expr.php

@@ -82,7 +82,7 @@ class Expr
      */
     public function select($select = null)
     {
-        return new Expr\Select(func_get_args());
+        return new Expr\Select(is_array($select) ? $select : func_get_args());
     }
     
     /**