GCC 4.6 claims that
error: 'best.len' may be used uninitialized in this function
so silence that warning which is treated as an error by also initializing
the "len" members of the struct.
Signed-off-by: Sebastian Schuberth <sschuberth@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>