Ringboxcore v1.2

Fixed a bug where respawning or being on a loop would cause the Ringboxcore sounds to play on every tic.
Changed the Jackpot award to be from Gamblecore 2: "I can't stop winning!"
Added rbc_debugprint to show debug information regarding Ringboxcore. Default is Off.

Fixed bugs regarding the "Let's go gambling!" sound effects retriggering upon touching a Ring Box while the roulette or an item is held, requiring another Ring Box award to be claimed.

Refactored code to not use S_IdPlaying for checking for sounds. This refactoring fixes the aforementioned bug. (Thanks, haya!)