Added Gfx wait on LoadMenuEnd(). Otherwise, some levels would not start after loading all required files.
Also, added GPU wait on Menu.c before entering the main loop.
An invalid index inside sound table was being accessed when creating an arrival flight. This made the game crash only under real hardware.
Other minor changes and fixes.
Game.c: parking slots cannot be selected if an aircraft in STATE_PARKED state is on it.
Other fixes and improvements.
Added some tiles from TILESET2.TIM
* Files needed for Game are now only loaded once, except from LEVEL1.PLT.
* Added DevMenu to get debug info.
* ISR_LoadMenuVBlank() does not stop when accessing SIO.
* On fopen() and SERIAL_INTERFACE defined, "#" is prepended and "@" is appended to filename string.