devel/vera++: Fix PORTREVISION

This port is currently marked BROKEN, but PORTREVISON was rolled
backwards in [1] when it was marked as such. Not my doing (this time),
just noticed this because chkversion.pl spams all perceived problems to
all "offenders". Spare the maintainer of this port from further daily
emails about something that they had nothing to do with.

[1] https://cgit.freebsd.org/ports/commit/?id=3c6ea4acbd48a9232d6f05fdf2213ae5950cb144