p4000: use -3000 when promising -3000
p4000: use -3000 when promising -3000

The 'log -3000 (baseline)' test accidentally still used -1000 from an
earlier version.

Noticed-by: Lawrence Holding <dee880c9351bf2c77e53b7e2fa56f54d0e743d21@cubic.com>
Signed-off-by: Thomas Rast <18f23ef7096473d837b7404952f13710423b8b63@student.ethz.ch>
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