Snippets for libtraceevent 1.9 from Nix aarch64-linux

Sourced from https://hydra.nixos.org/log/c6n0yxz12vb5gdnxpipdkyn743a3arjk-libtraceevent-1.9.drv.

• ../src/event-parse.c:5162:56: warning: '__builtin___snprintf_chk' output may be truncated before the last format character [-Wformat-truncation=]
   5162 |                         snprintf(buf, fmtsize + 1, "-%d", firstzero - 1);
        |                                                        ^