Test if connection is still open

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@19313 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ZLDAPConnection/ZLDAP.py

@@ -372,6 +372,8 @@ class ZLDAPConnection(
             self._v_conn = None
         if self._v_conn is None or not self.shouldBeOpen():
             return 0
+        elif not self.__ping():
+            return 0
         else:
             return 1