Fix: Don't crash on kick without user

[TheBenji]

If you do "/KICK " and don't specify a user the server crashes

home/ben/workspace/ircd.js/lib/commands.js:123
userNames = users.split(','),
^
TypeError: Cannot call method 'split' of undefined
at Object.Commands.KICK (/home/ben/workspace/ircd.js/lib/commands.js:123:27)
at Object.Server.respondToMessage (/home/ben/workspace/ircd.js/lib/server.js:171:36)
at Object.Server.respond (/home/ben/workspace/ircd.js/lib/server.js:181:14)
at Object.Server.data (/home/ben/workspace/ircd.js/lib/server.js:320:10)
at Carrier. (/home/ben/workspace/ircd.js/lib/server.js:277:51)
at Carrier.emit (events.js:95:17)
at /home/ben/workspace/ircd.js/node_modules/carrier/lib/carrier.js:71:15
at process._tickCallback (node.js:419:13)

Doesn't happen anymore with this fix and just sends an "needs more arguments"

[sespindola]

Good catch, thanks for the fix.
Your patch seems to alter the indentation of several lines. Could you please clean that up?

[TheBenji]

Just seems like it.
The whole part between l137-160 is now within the "else"-block and therefore the indentation moved a little.

I (well, my editor :P) also removed the trailing whitespaces (l336 & l498).

Hope that makes sense

[orliesaurus]

Can you merge this please???? @sespindola

[Meleeman01]

lol is there a way i can participate in this? otherwise i'll gladly fork this as i've been looking for a node.js implementation of irc