Fix return code on verify (should be 0, not 1 on no errors)

scripts/image_signing/sign_official_build.sh

 #!/bin/bash
 
 # Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 # Sign the final build image using the "official" keys.
 #
 # Prerequisite tools needed in the system path:
 #
@@ skipping 396 matching lines @@
 sign_for_factory_install() {
   ${SCRIPT_DIR}/resign_image.sh ${INPUT_IMAGE} ${OUTPUT_IMAGE} \
     ${KEY_DIR}/installer_kernel_data_key.vbprivk \
     ${KEY_DIR}/installer_kernel.keyblock
   echo "Signed factory install image output to ${OUTPUT_IMAGE}"
 }
 
 # Verification
 if [ "${TYPE}" == "verify" ]; then
   verify_image
-  exit 1
+  exit 0
 fi
 
 # Signing requires an output image name
 if [ -z "${OUTPUT_IMAGE}" ]; then
   usage
   exit 1
 fi
 
 
 if [ "${TYPE}" == "ssd" ]; then
@@ skipping 26 matching lines @@
   resign_firmware_payload ${INPUT_IMAGE}
   update_rootfs_hash ${INPUT_IMAGE} \
     ${KEY_DIR}/installer_kernel.keyblock \
     ${KEY_DIR}/installer_kernel_data_key.vbprivk \
     2
   sign_for_factory_install
 else
   echo "Invalid type ${TYPE}"
   exit 1
 fi