Fix build with GCC 14

--- a/src/gltron.c
+++ b/src/gltron.c
@@ -10,7 +10,7 @@
 #include "SDL.h"
 
 int main(int argc, char *argv[] ) {
-	initSubsystems(argc, argv);
+	initSubsystems(argc, (const char**)argv);
 	runScript(PATH_SCRIPTS, "main.lua");
   return 0;
 }