gltron: fix the build against gcc-14

Without the change `gltron` fails to build as:

    ./src/gltron.c: In function 'main':
    ./src/gltron.c:13:30: error: passing argument 2 of 'initSubsystems' from incompatible pointer type [-Wincompatible-pointer-types]
       13 |         initSubsystems(argc, argv);
          |                              ^~~~
          |                              |
          |                              char **

pkgs/by-name/gl/gltron/package.nix

@@ -20,7 +20,16 @@ stdenv.mkDerivation rec {
     sha256 = "e0c8ebb41a18a1f8d7302a9c2cb466f5b1dd63e9a9966c769075e6b6bdad8bb0";
   };
 
-  patches = [ ./gentoo-prototypes.patch ];
+  patches = [
+    ./gentoo-prototypes.patch
+
+    # gcc-14 build fix: https://sourceforge.net/p/gltron/patches/7/
+    (fetchurl {
+      name = "gcc-14.patch";
+      url = "https://sourceforge.net/p/gltron/patches/7/attachment/gcc-14.patch";
+      hash = "sha256-OJAUAM/OQVwxYnIacBkncNxMLn/HDCoysbi+Txe+DC8=";
+    })
+  ];
 
   postPatch = ''
     # Fix https://sourceforge.net/p/gltron/bugs/15