[#1033] Fix validation in term_translation_update_many.

Now checks that data is present and that it is a list.

ckan/logic/action/update.py

@@ -764,11 +764,10 @@ def term_translation_update_many(context, data_dict):
     '''
     model = context['model']
 
-
-    if not data_dict.get('data') and isinstance(data_dict, list):
+    if not (data_dict.get('data') and isinstance(data_dict.get('data'), list)):
         raise ValidationError(
-            {'error':
-             'term_translation_update_many needs to have a list of dicts in field data'}
+            {'error': ['term_translation_update_many needs to have a '
+                       'list of dicts in field data']}
         )
 
     context['defer_commit'] = True