removed an else condition, fixed a parameter annotation and make little improvements

lib/Doctrine/DBAL/Query/Expression/CompositeExpression.php

@@ -75,7 +75,7 @@ class CompositeExpression implements \Countable
      */
     public function addMultiple(array $parts = [])
     {
-        foreach ((array) $parts as $part) {
+        foreach ($parts as $part) {
             $this->add($part);
         }
 

lib/Doctrine/DBAL/Query/QueryBuilder.php

@@ -473,7 +473,7 @@ class QueryBuilder
 
         $selects = is_array($select) ? $select : func_get_args();
 
-        return $this->add('select', $selects, false);
+        return $this->add('select', $selects);
     }
 
     /**