Pull up following revision(s) (requested by kamil in ticket #758):

sys/kern/kern_proc.c: revision 1.212

Don't set errno ESRCH for empty result of KINFO_PROC[2]

Restore the previous behavior as it's prefered.
This new behavior was introduced in 1.210.
Code should check for length of the result.

Requested by <mlelstv>

(martin)