[automerger skipped] libsnapshot: Initialize merge_op_start_ to zero. am: d36a6818 -s ours

am skip reason: Merged-In I3cc48a66b532cfe8b2d87c8724d77ab3169a2ddb with SHA-1 fc9a48f5 is already in history

Original change: https://googleplex-android-review.googlesource.com/c/platform/system/core/+/18512862



Change-Id: Iffb7e3f1f27d338112c6e4cd51a7e6b9c6f6fe69
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>