Snippets for angband 4.2.6 from Nix aarch64-linux

Sourced from https://hydra.nixos.org/log/0gibpi29yyr4dm7x4m5i5g6rcq6k0vvi-angband-4.2.6.drv.

• ui-knowledge.c:343:56: warning: comparison of integer expressions of different signedness: 'wchar_t' {aka 'unsigned int'} and 'int' [-Wsign-compare]
    343 |                         if (*char_left_ptr + eff_width <= MIN(255, (int)c + frame_right))
        |                                                        ^~
  

• ui-knowledge.c:485:79: warning: comparison of integer expressions of different signedness: 'wchar_t' {aka 'unsigned int'} and 'int' [-Wsign-compare]
    485 |                                         *char_left_ptr + (width / tile_width) <=
        |                                                                               ^~
  

• z-color.c:170:15: warning: comparison is always false due to limited range of data type [-Wtype-limits]
    170 |         if (c < 0) return (c);
        |               ^