Music Still On

[IKO4299]

SuperTux Version

ex. v0.6.3-1334-g36837d01a

System Information

ex. Ubuntu 64-bit

Expected Behavior

The Main Theme Music Keeps Going On After Being Closed. Also, the Music Goes On Mixing With The Other SuperTux Music

Actual Behavior

The Music Keeps Going On When Being Closed

Steps To Reproduce Actual Behavior

1. the music is on when being closed off 2. it can only be stopped by turning off the volume 3.the bug can not stop for now.

Additional Information

No response

Guidelines For Reporting Issues

• [X] I have read https://github.com/SuperTux/supertux/blob/master/CONTRIBUTING.md#bug-reports.
• [X] I have verified this isn't an issue that's already been reported.
• [X] I have verified this isn't a discussion, or an issue about a crash or a feature request, but rather an actual bug ─ that is, the game did something not intended.
• [X] I have verified this issue is not about wrong translations (use Transifex for those), or anything unsupported (e.g. third-party add-ons).
• [X] In this report, I have only included details about one (1) bug.
• [X] If I make a mistake while submitting this report, I agree to use the "Edit" feature to correct it, instead of closing this issue and opening a new one.