Snippets for mangowm 0.16.2 from Nix x86_64-linux

Sourced from https://hydra.nixos.org/log/wnclkc4y45v5f4ffpfcvkndbhdq1syas-mango-0.16.2.drv.

• ../src/mango.c:1543:17: warning: ignoring return value of 'write' declared with attribute 'warn_unused_result' [-Wunused-result]
   1543 |                 write(readiness_fd, "\n", 1);
        |                 ^~~~~~~~~~~~~~~~~~~~~~~~~~~~