Fix zombie ffmpeg process

In case of closing the UI window while the player was active the
`ffmpeg` process continued while soundbox-app was closed. This is highly
unwanted behavior since the user is not able to stop it without advanced
tools.

Waiting properly for the player context to be done solves the issue.

1 files changed, 2 insertions, 0 deletions

diff --git a/main.go b/main.go
index 47429cf..060f76c 100644
--- a/main.go
+++ b/main.go
@@ -75,7 +75,9 @@ func (ui *Ui) Cleanup() {
 	defer ui.State.Unlock()
 
 	if ui.State.PlayerCancel != nil {
+		done := ui.State.PlayerContext.Done()
 		ui.State.PlayerCancel()
+		<-done
 	}
 }