Allow PM's to not be ignored

cogs/utils/checks.py

@@ -66,6 +66,8 @@ def is_owner(ctx):
     return ctx.message.author.id in config.owner_ids
 
 def should_ignore(message):
+    if message.guild is None:
+        return False
     try:
         server_settings = config.cache.get('server_settings').values
         ignored = [x for x in server_settings if x['server_id'] == str(