git-status used the buffer name to find git-status buffers, and that
can fail if the buffer has another name, for example when multiple
working directories is tracked.
Signed-off-by: Rémi Vanicat <vanicat@debian.org> Acked-by: Alexandre Julliard <julliard@winehq.org> Tested-by: Xavier Maillard <xma@gnu.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>