Use lower level Guild.owner_id for permission resolution.

discord/abc.py

@@ -418,8 +418,7 @@ class GuildChannel:
         # The operation first takes into consideration the denied
         # and then the allowed.
 
-        o = self.guild.owner
+        if self.guild.owner_id == member.id:
-        if o is not None and member.id == o.id:
             return Permissions.all()
 
         default = self.guild.default_role

discord/member.py

@@ -432,7 +432,7 @@ class Member(discord.abc.Messageable, _BaseUser):
         administrator implication.
         """
 
-        if self.guild.owner == self:
+        if self.guild.owner_id == self.id:
             return Permissions.all()
 
         base = Permissions.none()