#7 gcc-14 build fix

[Sergei Trofimovich]

https://gcc.gnu.org/gcc-14/porting_to.html switched a few warnings to errors.

The patch fixes the build against gcc-14. Without the change the build fails as
https://hydra.nixos.org/build/281975802/nixlog/3:

    ./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 **