message: Fix error on Appveyor
diff: @@ -83,6 +83,7 @@ def get_tag(ci):
  elif ci == CI.APPVEYOR:
  if "APPVEYOR_REPO_TAG_NAME" in os.environ:
  return os.getenv("APPVEYOR_REPO_TAG_NAME", "")
  + return ""
  elif ci == CI.GITHUB_ACTIONS:
  ref = os.getenv("GITHUB_REF", "")
  logger.info("Github Action tag: {}".format(ref))
  @@ -126,7 +127,7 @@ logger.info("CI: %s", CI_PRETTY_NAME)
  ALLOWED_BRANCHES = {"master", "deploy", "devel"}
  BRANCH_NAME = get_branch(CURRENT_CI)
  TAG_NAME = get_tag(CURRENT_CI)
  -IS_TAGGED = len(TAG_NAME) > 0
  +IS_TAGGED = TAG_NAME is not None and len(TAG_NAME) > 0
  logger.info("Branch: %s", BRANCH_NAME)
  logger.info("Tag: %s", TAG_NAME)
  if BRANCH_NAME not in ALLOWED_BRANCHES and not IS_TAGGED:
  