Enable more compiler warnings am: 0febd3282d Original change: https://android-review.googlesource.com/c/platform/external/f2fs-tools/+/2193534 Change-Id: I74b2cfc24fce1838e0c7933615ee719b54acf5f0 Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>