K 10
svn:author
V 4
bapt
K 8
svn:date
V 27
2014-10-28T14:54:04.986567Z
K 7
svn:log
V 406
Do not delete the group wheel when bad argument is passed to pw groupdel -g

Check that the -g argument is actually a number, if not report an error.
This argument is converted without checking with atoi(3) later so without this
check it converts any alpha entries into 0 meaning it deletes the group wheel

Add a regression test about it

PR:		90114
Reported by:	bkoenig@cs.tu-berlin.de
MFC after:	1 week

END