reflog-expire: brown paper bag fix.
reflog-expire: brown paper bag fix.

When --stale-fix is not passed, the code did not initialize the
two commit objects properly.

Signed-off-by: Junio C Hamano <dc50d1021234060e53ec42a77d526afa2fe07479@cox.net>

destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git