allow to customize the output of the asText method through a script found by _getTypeBasedMethod

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@3757 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5/Document/Telephone.py

@@ -95,6 +95,9 @@ class Telephone(Coordinate, Base):
         """
           Returns the telephone number in standard format
         """
+        script = self._getTypeBasedMethod('asText')
+        if script is not None:
+          return script()
         text = '+'
         if self.telephone_country != None:
                 text += self.telephone_country