Merge pull request #6968 from Bnyro/master

fix: crash when switching to audio player

Author: Bnyro

app/src/main/java/com/github/libretube/ui/fragments/PlayerFragment.kt

@@ -259,7 +259,7 @@ class PlayerFragment : Fragment(), OnlinePlayerOptions {
                     Player.EVENT_PLAYBACK_STATE_CHANGED,
                     Player.EVENT_IS_PLAYING_CHANGED,
                     Player.EVENT_PLAY_WHEN_READY_CHANGED
-                )
+                ) && _binding != null
             ) {
                 updatePlayPauseButton()
             }