vz_chroot(): fix off-by-one in sigaction() argument

According to bits/signum.h, NSIG is the biggest signal number + 1,
so fix the for() loop accordingly.

Found while using valgrind:

	==775013== Warning: bad signal number 65 in sigaction()

Signed-off-by: Kir Kolyshkin <kir@openvz.org>
1 file changed