bisect.c: reduce scope of variable
bisect.c: reduce scope of variable

Signed-off-by: Elia Pinto <df03e0c7173e07ef3c9602924c6f30b9854066f0@gmail.com>
Signed-off-by: Junio C Hamano <a6723cc3f76163bf7adb636a73ac3b0ceb3e6b9b@pobox.com>

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