TG: Some fixes for topic calls and inputs.

There's like 1001 things to fix so some of this is somewhat crude for now.

new helper proc located in procs/helpers.dm
reject_bad_text(var/text)
just feed any text in and it will either return the original text or null (if it
contains odd characters such as \ / < > or characters reserved by BYOND. It also
rejects if there are no non-whitespace characters)
Revision: r3571
Author: 	 elly1...@rocketmail.com

code/modules/paperwork/handlabeler.dm

@@ -40,7 +40,7 @@
 	if(mode)
 		usr << "\blue You turn on the hand labeler."
 		//Now let them chose the text.
-		var/str = input(usr,"Label text?","Set label","")
+		var/str = reject_bad_text(input(usr,"Label text?","Set label",""))	//sanitize stuff! GOD DAMN THIS IS A SECURITY HOLE
 		if(!str || !length(str))
 			usr << "\red Invalid text."
 			return