Bug#1533: `w' produces bogus login@, idle time &c for xdm login entry

[Ian Jackson <iwj10@cus.cam.ac.uk>]

Package: procps
Version: 0.97-4

-chiark:~> who
ian      :0       Oct  3 12:15
[...]
-chiark:~> w
  1:34pm  up 3 days,  1:29,  8 users,  load average: 0.57, 0.37, 0.35, 1/69
User     tty       login@  idle   JCPU   PCPU  what
ian      :0       12:15pm75days 525:15
[...]

Ian.