Fixed #14880 - raw_id_fields in admin does not work when limit_choices_to dictionary has value=False

Thanks to smallming for the report.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@15348 bcc190cf-cafb-0310-a4f2-bffc1f526a37

django/contrib/admin/widgets.py

@@ -102,6 +102,9 @@ def url_params_from_lookup_dict(lookups):
         for k, v in lookups.items():
             if isinstance(v, list):
                 v = u','.join([str(x) for x in v])
+            elif isinstance(v, bool):
+                # See django.db.fields.BooleanField.get_prep_lookup
+                v = ('0', '1')[v]
             else:
                 v = unicode(v)
             items.append((k, v))