scanning gs fonts hang for gs 6.x-7.x

[Liyu Liu]

I modified the showfont.ps by by Dylan Mcnamee so that I can define TSTN in
windows batch file and use it to create font sample files. The gs will
freeze when scanning fonts coming with the package (usually C:\gs\fonts)
when I disabled the fontmap. All released version (GPL/AFPL) I tried after
gs-5.50 have this bug. :-(

SET GS_DIR=C:\gs\gs-7.xx
SET GS_FONTPATH=%2;D:\Acrobat\Reader\psfonts;%windir%\Fonts;C:\gs\fonts
SET GS_LIB=.;%GS_DIR%

%GS_DIR%\gswin32c.exe -dBATCH -dNOFONTMAP -dNOPAUSE -sPAPERSIZE=letter -P- -
sDEVICE=psmono -sOutputFile=%1.ps -sTSTN=%1 ShowFont2.ps