Pull up following revision(s) (requested by kamil in ticket #900):

usr.sbin/sysinst/util.c: revision 1.10,1.11

Enlarge the set_status[] array by a single element
In the get_and_unpack_sets() function there is accessed the
set_status[SET_GROUP_END] element in the array. The array is allocated on
the stack with SET_GROUP_END elements. This means that it is 1 element too
short.

-

Revert previous, fix iteration loops to be consistent:
All sets that have an id >= SET_LAST have NULL name, so use that like the
loop just below.

(martin)