[FIX] auth_ldap: filter format

The LDAP method filter_format(filter_template,assertion_values) requires
that the length of assertion_values matches the count of %s in
filter_template. If not, a TypeError exception is thrown.

This fix catches the exception and displays an understandable error
message instead.

opw-608126
opw-657370

addons/auth_ldap/users_ldap.py

@@ -96,7 +96,11 @@ class CompanyLDAP(osv.osv):
             return False
 
         entry = False
-        filter = filter_format(conf['ldap_filter'], (login,))
+        try:
+            filter = filter_format(conf['ldap_filter'], (login,))
+        except TypeError:
+            _logger.warning('Could not format LDAP filter. Your filter should contain one \'%s\'.')
+            return False
         try:
             results = self.query(conf, filter)