Snippets for decker 1.70 from Nix aarch64-linux

Sourced from https://hydra.nixos.org/log/j790nrw9gkc01i7dvcc5k95sf5jdw037-decker-1.70.drv.

• ./c/io_sdl2.h:82:87: warning: zero-length gnu_printf format string [-Wformat-zero-length]
     82 |         if(t){snprintf(path,PATH_MAX,"%s",t);SDL_free(t);}else{snprintf(path,PATH_MAX,"");}
        |                                                                                       ^~