[FIX] tools mail: html_email_clean return False (standard OpenERP) if the param is False

bzr revid: chm@openerp.com-20121120134001-ivw9dqxha2du70o6

openerp/tests/test_mail.py

@@ -175,7 +175,7 @@ class TestCleaner(unittest2.TestCase):
 
         # Test5: False boolean for text must return empty string
         new_html = html_email_clean(False)
-        self.assertEqual(new_html, '', 'html_email_cleaner did not change a False (boolean) in an empty string.')
+        self.assertEqual(new_html, False, 'html_email_cleaner did change a False in an other value.')
 
 class TestHtmlTools(unittest2.TestCase):
     """ Test some of our generic utility functions about html """

openerp/tools/mail.py

@@ -131,7 +131,7 @@ def html_email_clean(html):
         return dest
 
     if not html:
-        return ''
+        return False
 
     html = ustr(html)