Snippets for discount 3.0.1.3 from Nix aarch64-darwin

Sourced from https://hydra.nixos.org/log/7jhzh6ghaq2wds3fx3q87w10m7xz9nb7-discount-3.0.1.3.drv.

• gethopt.c:69:18: warning: implicit truncation from 'int' to a one-bit wide bit-field changes value from 1 to -1 [-Wsingle-bit-bitfield-constant-conversion]
     69 |             ctx->optend = 1;
        |                         ^ ~
  

• gethopt.c:77:18: warning: implicit truncation from 'int' to a one-bit wide bit-field changes value from 1 to -1 [-Wsingle-bit-bitfield-constant-conversion]
     77 |             ctx->optend = 1;
        |                         ^ ~
  

• tools/rep.c:37:1: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C23 [-Wdeprecated-non-prototype]
     37 | main(argc, argv)
        | ^