tree dd0c193f50eaf4742ba28bc8ad577f9613609d98
parent 93e445e84b82b182ccf6123c6068bcd12d45c2f3
author Wyatt Hepler <hepler@google.com> 1575400273 -0800
committer Wyatt Hepler <hepler@google.com> 1575400273 -0800

pw_string: Fix test for limited snprintfs

snprintf should return a negative number if there is a formatting error.
Limited snprintf implementations may not detect these errors. This
caused the test to fail on the STM32 Discovery F429i.

Change-Id: I1da8593c258508c0d3e2fa6c440a58493ce15597