check_check: do setup regardless of availability of fork
check_check: do setup regardless of availability of fork

The tests originally protected by the HAVE_FORK check will
work if fork is unavailable. Further, setup() does work that
is required by the tests which follow.

git-svn-id: ae38cf1093b87151f738d2b2220cac7742ad2e55@773 64e312b2-a51f-0410-8e61-82d0ca0eb02a

lubosz/check,lubosz/check,lubosz/check,lubosz/check