fix(bot): 🚑 Hangup not working.

payphone/cogs/calls/cog.py

@@ -466,20 +466,22 @@ class Calls(base.Cog):
                 constants.CHANNELS_ONCALL_SET, str(channel_id), str(other_channel.id)
             )
 
-            try:
-                await (await self.bot.get_or_fetch_channel(other_channel.id)).send(
-                    f"☎️ {secrets.choice(constants.MSGS_PHONE_HANGUP_YOU)}"
-                )
+            if other_channel is not None:
+                try:
+                    await (await self.bot.get_or_fetch_channel(other_channel.id)).send(
+                        f"☎️ {secrets.choice(constants.MSGS_PHONE_HANGUP_YOU)}"
+                    )
 
-            except errors.DiscordException:
-                pass
+                except errors.DiscordException:
+                    pass
+
+                other_channel.call = None
 
             await ctx.send(f"☎️ {secrets.choice(constants.MSGS_PHONE_HANGUP_ME)}")
 
             channel.call = None
-            other_channel.call = None
 
-            await models.Channel.bulk_update([channel, other_channel], ["call_id"])
+            await models.Channel.bulk_update([channel] + ([other_channel] if other_channel is not None else []), ["call_id"])
 
             call.ended_at = datetime.now(timezone.utc)
             await call.save()