* util/i386/pc/grub-setup.c (setup): In find_first_partition_start(),
set `first_start' to 0 for non-PC/MSDOS partition maps.
* util/i386/pc/grub-setup.c (setup): In find_first_partition_start(),
set `first_start' to 0 for non-PC/MSDOS partition maps.