cm256cc: pull fix pending upstream inclusion for gcc-13

Without the change build fails on `gcc-13` as:

$ nix build --impure --expr 'with import ./. {}; cm256cc.override { stdenv = gcc13Stdenv; }' -L
...
/build/source/unit_test/data.h:37:9: error: 'uint16_t' does not name a type
37 | uint16_t i;
| ^~~~~~~~
/build/source/unit_test/data.h:33:1: note: 'uint16_t' is defined in header '<cstdint>'; this is probably fixable by adding '#include <cstdint>'
32 | #include <string.h>
+++ |+#include <cstdint>

pkgs/development/libraries/cm256cc/default.nix

···
-{ lib, stdenv, fetchFromGitHub, cmake, boost } :
+{ lib, stdenv, fetchFromGitHub, fetchpatch, cmake, boost } :
 
 stdenv.mkDerivation rec {
   pname = "cm256cc";
···
     rev = "v${version}";
     sha256 = "sha256-T7ZUVVYGdzAialse//MoqWCVNBpbZvzWMAKc0cw7O9k=";
   };
+
+  patches = [
+    # Pull fix pending upstream inclusion for gcc-13 support:
+    #   https://github.com/f4exb/cm256cc/pull/18
+    (fetchpatch {
+      name = "gcc-13.patch";
+      url = "https://github.com/f4exb/cm256cc/commit/a7f142bcdae8be1c646d67176ba0ba0f7e8dcd68.patch";
+      hash = "sha256-J7bm44sqnGsdPhJxQrE8LDxZ6tkTzLslHQnnKmtgrtM=";
+    })
+  ];
 
   nativeBuildInputs = [ cmake ];
   buildInputs = [ boost ];