python-linux-procfs: pflags: Handle pids that completed

Sometimes pids disappear when they are completed.

Programs such as pflags that use procfs must account for that.
The solution is to simply recognize this situation, and to continue.

Reviewed-by: Leah Leshchinsky <lleshchi@redhat.com>
Signed-off-by: John Kacur <jkacur@redhat.com>
1 file changed