lib/tst_test.c: fix case of hitting tst_vbrk_ before setup_ipc

We can hit TBROK/TCONF before call to setup_ipc(), for example
a TCONF in kernel version check, in which case do_exit() tries
to use NULL pointer 'results'.

Signed-off-by: Xiao Yang <yangx.jy@cn.fujitsu.com>
Signed-off-by: Jan Stancek <jstancek@redhat.com>
1 file changed