- Urgent fix to NTSL. Sanitizes the output of NTSL, including the broadcast() function.

- Added a GetCleanVar to be used when getting a global variable to use inside the game code, it will sanitize() the variable if the compare argument is not equal to it; the compare argument should used to see if NTSL has changed the value.
 - Added a sanitize_data proc for the signal datum. It will sanitize all the data using strip_html_simple().

code/modules/scripting/Interpreter/Interaction.dm

@@ -110,6 +110,17 @@
 			var/x = globalScope.variables[name]
 			return Eval(x)
 
+/*
+	Proc: GetCleanVar
+	Returns the value of a global variable in the script and cleans it (sanitizes).
+*/
+
+		GetCleanVar(name, compare)
+			var/x = GetVar(name)
+			if(istext(x) && compare && x != compare) // Was changed
+				x = sanitize(x)
+			return x
+
 /*
 	Proc: CallProc
 	Calls a global function defined in the script and, amazingly enough, returns its return value. Remember to ensure that the function