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

Author: AlessandroMinoccheri

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

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

lib/Doctrine/DBAL/Query/QueryBuilder.php

@@ -409,9 +409,9 @@ public function getMaxResults()
      * The available parts are: 'select', 'from', 'set', 'where',
      * 'groupBy', 'having' and 'orderBy'.
      *
-     * @param string $sqlPartName
-     * @param string $sqlPart
-     * @param bool   $append
+     * @param string  $sqlPartName
+     * @param string|array  $sqlPart
+     * @param bool $append
      *
      * @return $this This QueryBuilder instance.
      */
@@ -473,7 +473,7 @@ public function select($select = null)
 
         $selects = is_array($select) ? $select : func_get_args();
 
-        return $this->add('select', $selects, false);
+        return $this->add('select', $selects);
     }
 
     /**