When submitting a score to a leaderboard with an ID of "" the AppGameKit Player crashes. Snippet from Logcat:
java.lang.IllegalStateException: Leaderboard ID must not be null or empty
06-04 23:43:48.543 21821 21851 E AndroidRuntime: at android.os.Parcel.readException(Parcel.java:1628)
06-04 23:43:48.543 21821 21851 E AndroidRuntime: at android.os.Parcel.readException(Parcel.java:1573)
06-04 23:43:48.543 21821 21851 E AndroidRuntime: at com.google.android.gms.games.internal.IGamesService$Stub$Proxy.zza(Unknown Source)
06-04 23:43:48.543 21821 21851 E AndroidRuntime: at com.google.android.gms.games.internal.GamesClientImpl.zza(Unknown Source)
06-04 23:43:48.543 21821 21851 E AndroidRuntime: at com.google.android.gms.games.internal.api.LeaderboardsImpl.submitScore(Unknown Source)
06-04 23:43:48.543 21821 21851 E AndroidRuntime: at com.google.android.gms.games.internal.api.LeaderboardsImpl.submitScore(Unknown Source)
06-04 23:43:48.543 21821 21851 E AndroidRuntime: at com.thegamecreators.agk_player.AGKHelper.GameCenterSubmitScore(AGKHelper.java:2220)
06-04 23:43:48.545 1851 9852 W ActivityManager: Force finishing activity com.thegamecreators.agk_player2/com.thegamecreators.agk_player.AGKActivity
Of course, I do not have a leaderboard with ID "", it was just some empty value while testing before all was set up. Still, I think it should not crash the player with no error msg.
