Fix entries counter for annotated entries in the menu

The query were badly made and return all annotations for the current user instead of the total of entries with annotation(s).

src/Wallabag/AnnotationBundle/Repository/AnnotationRepository.php

@@ -152,6 +152,12 @@ class AnnotationRepository extends ServiceEntityRepository
             ->getResult();
     }
 
+    public function getCountBuilderByUser($userId = null)
+    {
+        return $this->createQueryBuilder('e')
+            ->andWhere('e.user = :userId')->setParameter('userId', $userId);
+    }
+
     /**
      * Return a query builder to used by other getBuilderFor* method.
      *