block: don't set GD_NEED_PART_SCAN if scan partition failed
Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2179915
Signed-off-by: Ming Lei ming.lei@redhat.com
Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2179915
Signed-off-by: Ming Lei ming.lei@redhat.com