Check for existence of auto_close_task

Author: kyb3r

cogs/modmail.py

@@ -251,7 +251,7 @@ async def close(self, ctx, *, after: UserFriendlyTime = None):
 
         if cancel:
 
-            if thread.close_task is not None:
+            if thread.close_task is not None or thread.auto_close_task is not None:
                 await thread.cancel_closure(all=True)
                 embed = discord.Embed(
                     color=discord.Color.red(),