Pass correct argument type to should_heartbeat call

Signed-off-by: Maxime “pep” Buquet <pep@bouah.net>

slixmpp_omemo/__init__.py

@@ -654,7 +654,7 @@ class XEP_0384(BasePlugin):
         finally:
             asyncio.ensure_future(self._publish_bundle())
 
-        if self.auto_heartbeat and self.should_heartbeat(jid):
+        if self.auto_heartbeat and self.should_heartbeat(sender):
             async def send_heartbeat():
                 msg = await self.make_heartbeat(JID(jid))
                 msg.send()