fixed issue 647, problem with is_in_db and multiple, thanks Manuele Presenti

VERSION

@@ -1 +1 @@
-Version 1.99.4 (2012-02-09 11:21:10) stable
+Version 1.99.4 (2012-02-11 23:04:52) stable

gluon/validators.py

@@ -466,6 +466,7 @@ class IS_IN_DB(Validator):
             items.sort(options_sorter)
         if zero and not self.zero is None and not self.multiple:
             items.insert(0,('',self.zero))
+        self.options() #
         return items
 
     def __call__(self, value):
@@ -479,7 +480,7 @@ class IS_IN_DB(Validator):
             if isinstance(self.multiple,(tuple,list)) and \
                     not self.multiple[0]<=len(values)<self.multiple[1]:
                 return (values, translate(self.error_message))
-            if not [x for x in values if not x in self.theset]:
+            if not [x for x in values if not str(x) in self.theset]:
                 return (values, None)
         elif self.theset:
             if str(value) in self.theset: