fixed syntax error handling for nether tunnels in addbase

MCInfoBot.py

@@ -151,7 +151,11 @@ async def addbase(ctx, name: str, x_pos: int, y_pos: int, z_pos: int, * args):
     '''
 
     owner = Player(str(ctx.message.author.nick))
+
+    try:
         base = Location(name, x_pos, y_pos, z_pos, owner.in_game_name, args)
+    except LocationInitError:
+        raise commands.UserInputError
 
     session.add(owner)
     session.add(base)