[#1421] Ensure that check_access is called on activity_create

Otherwise when disabling the activity streams the action returned before
calling the auth function, which made the auth audit fail

ckan/logic/action/create.py

@@ -1011,6 +1011,8 @@ def activity_create(context, activity_dict, **kw):
 
     '''
 
+    _check_access('activity_create', context, activity_dict)
+
     # this action had a ignore_auth param which has been removed
     # removed in 2.2
     if 'ignore_auth' in kw:
@@ -1031,8 +1033,6 @@ def activity_create(context, activity_dict, **kw):
     else:
         activity_dict['revision_id'] = None
 
-    _check_access('activity_create', context, activity_dict)
-
     schema = context.get('schema') or ckan.logic.schema.default_create_activity_schema()
     data, errors = _validate(activity_dict, schema, context)
     if errors: