Fix style errors.

error file=/home/sloan/workspace/beyond/core/app/beyond/engine/javascript/lib/ScriptableConsole.scala message=If block needs braces line=21 column=4
error file=/home/sloan/workspace/beyond/core/app/beyond/engine/javascript/lib/ScriptableConsole.scala message=If block needs braces line=30 column=4
error file=/home/sloan/workspace/beyond/core/app/beyond/engine/javascript/lib/ScriptableConsole.scala message=If block needs braces line=39 column=4
error file=/home/sloan/workspace/beyond/core/app/beyond/engine/javascript/lib/ScriptableConsole.scala message=If block needs braces line=48 column=4
error file=/home/sloan/workspace/beyond/core/app/beyond/engine/javascript/lib/ScriptableConsole.scala message=If block needs braces line=57 column=4
Change message to val instead of var.