trusty: cast-auth: fix incorrect return value on error path am: 2d76f6d0bc Original change: https://android-review.googlesource.com/c/trusty/app/cast-auth/+/3031504 Change-Id: Ia5f02c5830b5870015ff32f7cfd0844d02182659 Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>