libsixel: 1.10.3 -> 1.10.5

diff --git a/src/stb_image.h b/src/stb_image.h

index f12c30b..526281c 100644

--- a/src/stb_image.h

+++ b/src/stb_image.h

@@ -1534,6 +1534,7 @@ static unsigned char *stbi__convert_format(unsigned char *data, int img_n, int r

    int i,j;

    unsigned char *good;

+   if (data == NULL) return data;

    if (req_comp == img_n) return data;

    STBI_ASSERT(req_comp >= 1 && req_comp <= 4);

}:

stdenv.mkDerivation rec {

  pname = "libsixel";

  version = "1.10.3";

  version = "1.10.5";

  src = fetchFromGitHub {

    owner = "libsixel";

    repo = "libsixel";

    rev = "v${version}";

    sha256 = "1nny4295ipy4ajcxmmh04c796hcds0y7z7rv3qd17mj70y8j0r2d";

    hash = "sha256-obzBZAknN3N7+Bvtd0+JHuXcemVb7wRv+Pt4VjS6Bck=";

  };

  patches = [

    # https://github.com/NixOS/nixpkgs/issues/160670

    ./fix-CVE-2021-45340.patch

  ];

  buildInputs = [

    gdk-pixbuf

    gd