stm: correctly set bits when shutting down to idle

Author: DacoTaco

libogc/stm.c

@@ -223,6 +223,7 @@ s32 STM_ShutdownToIdle(void)
 		case 1:
 		case 2:
 			__stm_immbufin[0] = 0xFCA08280;
+			break;
 		default:
 			__stm_immbufin[0] = 0xFCE082C0;
 	}