Allowing expression in COUNT() DQL aggregation functions

lib/Doctrine/ORM/Query/Parser.php

@@ -2962,9 +2962,7 @@ class Parser
             $isDistinct = true;
         }
 
-        $pathExp = ($lookaheadType === Lexer::T_COUNT)
-            ? $this->SingleValuedPathExpression()
-            : $this->SimpleArithmeticExpression();
+        $pathExp = $this->SimpleArithmeticExpression();
 
         $this->match(Lexer::T_CLOSE_PARENTHESIS);