fixed var name typo

lib/ansible/playbook/block.py

@@ -341,7 +341,7 @@ class Block(Base, Become, Conditional, Taggable):
                 if isinstance(task, Block):
                     tmp_list.append(evaluate_block(task))
                 elif task.action == 'meta' \
-                or (task.action == 'include' and task.evaluate_tags([], play_context.skip_tags, all_vars=allvars)) \
+                or (task.action == 'include' and task.evaluate_tags([], play_context.skip_tags, all_vars=all_vars)) \
                 or task.evaluate_tags(play_context.only_tags, play_context.skip_tags, all_vars=all_vars):
                     tmp_list.append(task)
             return tmp_list