[cvsnt] Bug in command line parsing for tag command

[Jerzy Kaczorowski]

Tony,

There seem to be a bug in the tag command line parsing if it contains "--"
to mark the last argument and the begining of files, e.g.:
cvs.exe tag a -- -hyphenfile.tst
cvs.exe tag: nothing known about --
cvs.exe [tag aborted]: correct the above errors first!

But other commands work, e.g.:
cvs.exe status -q -- -hyphenfile.tst
File: -hyphenfile.tst   Status: Up-to-date

Best Regards,
Jerzy