small fix

General.py

@@ -84,7 +84,7 @@ class General(object):
 		Syntax: !gif [YT] [START] [DUUR] [RESOLUTIE] [FPS]
 		Bv: !gif RPxvTd_jCPQ 00:02:39 13 320 10
 		"""
-		if (duration > 20)
+		if (duration > 20):
 			yield from ctx.channel.send(ctx.author.mention + ' Au, stop. Dat is te lang.')
 		try:
 			yield from ctx.message.delete()