made function static, initialized datum variable

Signed-off-by: klux2 <k.lux.gm@gmail.com>

HSMensaW_botA.py.BAK

@@ -39,10 +39,12 @@ info_str = "*Mensa-Bot der Hochschule Mittweida (beta)*\nDieser Bot versendet je
 status = ""
 essen = []
 var = True
+datum = None
 
 
 class HSMensaW(telepot.aio.helper.ChatHandler):
-    async def on_chat_message(self, msg):
+    @staticmethod
+    async def on_chat_message(msg):
         global config, essen, status, var
 
         content_type, chat_type, chat_id = telepot.glance(msg)