sequencer: fix a memory leak in do_reset()
Fix a memory leak introduced in 9055e401dd6 (sequencer: introduce new commands to reset the revision, 2018-04-25), which called setup_unpack_trees_porcelain() without a corresponding call to clear_unpack_trees_porcelain(). This introduces a change in behavior in that we now start calling clear_unpack_trees_porcelain() even without having called the setup_unpack_trees_porcelain(). That's OK, that clear function, like most others, will accept a zero'd out struct. This inches us closer to passing various tests in "t34*.sh" (e.g. "t3434-rebase-i18n.sh"), but because they have so many other memory leaks in revisions.c this doesn't make any test file or even a single test pass. Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>