3.0.23rc1 and wrong primary group with 'force user'

[Thomas Bork]

If using

force user = tb

in a 3.0.23rc1 share, the primary group isn't determined correctly 
(found by Marcus Hochhuth):

deveis # ls -l /public/_aaa.txt
-rwxrwxrwx  1 tb 2147483404 0 Jun  1 21:09 /public/_aaa.txt
deveis # id tb
uid=2001(tb) gid=100(users) groups=100(users),202(mew)


[public]
  comment = public directory on %h
  browseable = yes
  writeable = yes
  path = /public
  read list =
  write list =
  create mode = 0777
  force create mode = 0777
  directory mode = 0777
  force directory mode = 0777
  force user = tb


der tom