[barcode] Buglet in no-ascii PS output

[Alessandro Rubini]

Hello

> Basically, the opening square bracket and comments for the text are output
> before the check for BARCODE_NO_ASCII.  It didn't make ghostscript or my
> printer puke, but it does make the PS source look strange.

Thanks, will be in 0.97.1 with the other fixes I got.

/alessandro