pw_bytes: Fix static analysis complaint in test
pw_bytes: Fix static analysis complaint in test

Change-Id: Id8085cd913d263413ac911ec9d92d188e2f3169e
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/31620
Reviewed-by: Keir Mierle <69344103cc60b36d6e1fbdc31ce6504b2286c646@google.com>
Commit-Queue: Prashanth Swaminathan <7074f112da8ec89069105f3b18a4ce46a4722488@google.com>

google/pigweed,google/pigweed,google/pigweed,google/pigweed,google/pigweed,google/pigweed,google/pigweed,google/pigweed,google/pigweed,google/pigweed