Support Unicode Characters in ErrorStdOut message

[RobertL]

Syntax error message of Unicode AHK can't display Unicode Characters correctly, it shows "??" instead. It's unrelated with editor or command line stdout.
For example, 1) code with compile-time syntax error around Chinese character, and 2) path with Chinese character would shows like:

Code: Select all

D:\???\???.ahk (1) : ==> Missing close-quote
     Specifically: "?

It's hard to debug, where sometimes the script path is unclear, so please support it. The ANIS AHK works alright.