There is no point in checking "!ref->name" when ref is a
"struct ref". The name field is a flex-array, and there
always has a non-zero address. This is almost certainly not
hurting anything, but it does cause clang-3.6 to complain.
Signed-off-by: NJeff King <peff@peff.net>
Signed-off-by: NJunio C Hamano <gitster@pobox.com>