get_octopus_merge_bases(): cleanup redundant variable
get_octopus_merge_bases(): cleanup redundant variable

pptr is needless. Some related code got cleaned as well.

Signed-off-by: Vasily Makarov <1de86827d15be619572faa09083dd4ffe86b9628@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