Android: The launcher accepts incorrect game paths that don't include the leading slash. This causes the engine to not find the game data later on if such a path is set. A leading slash is now forced on the game path.
iOS: Fixed crash in digi_ios_init(). Allegro mixer must be initialized before starting the audio queue.
Engine: Fixed games freezing while crossfading MP3 or WAV audio. This amends commit 61cf388fe86acc6a57ccdc3be69650a25e0b2fe8.