gEDA: gerbv --help is wrong

[Karel Kulhavý <clock@twibright.com>]

clock@beton:~$ gerbv -V       
gerbv version 0.15
(C) Stefan Petersen (spe@stacken.kth.se)
clock@beton:~$ gerbv --version
gerbv: invalid option -- -
Usage : gerbv [FLAGS] <gerber file(s)>
where FLAGS could be any of
  --version|-V : Prints version of gerbv
  --log=<logfile>|-l <logfile> : Send error messages to <logfile>

Cl<