[bluez/bluez] 19ad43: test-runner: Fix issues found by coverity

[BluezTestBot <noreply@xxxxxxxxxx>]

  Branch: refs/heads/master
  Home:   https://github.com/bluez/bluez
  Commit: 19ad4310c9b461783bc73a570be8efffd32b1e42
      https://github.com/bluez/bluez/commit/19ad4310c9b461783bc73a570be8efffd32b1e42
  Author: Frédéric Danis <frederic.danis@xxxxxxxxxxxxx>
  Date:   2022-06-17 (Fri, 17 Jun 2022)

  Changed paths:
    M tools/test-runner.c

  Log Message:
  -----------
  test-runner: Fix issues found by coverity