break when one Expression is found

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@41777 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5Type/tests/testClassTool.py

@@ -131,6 +131,7 @@ class TestClassTool(ERP5TypeTestCase):
       for category in getattr(ps, '_categories', []):
         if isinstance(category, Expression):
           found_one = 1
+          break
       if found_one:
         break
     else: