Leak in demo debug builds

[defagos]

There is a strange leak in the demo, only for debug builds. We should investigate.

Issue type

Incorrect behavior

Environment information

• Library version: 7.0.x
• iOS / tvOS version: Built / run with iOS 14.5
• Device: Device or simulator does not same to make a difference

Reproducibility

Always reproducible

Steps to reproduce

1. Run a debug build on device or in the simulator.
2. Play the SWI example.
3. Close the player. Sound does not stop.

Interesting things to note:

• No issues with the standalone or simple players, even when hooked to the service.
• Appeared suddenly with some 14.x release (cannot remember which one).

[defagos]

The leak was created by the playlist request in the advanced controller, creating a retain cycle with the view controller and thus preventing the player from correctly being released.

I fixed the code on iOS and applied the same fix for the similar tvOS code, though I didn't observe the leak for the demo when run on this platform.

[defagos]

Delivered with the 7.1.0 release.