Crash when flipping quickly between audio files
Steps to reproduce:
- Get a folder full of audio files
- Preview one of them with Sushi
- Click "Right" rapidly
- After a while, Sushi crashes.
Lots of (org.gnome.NautilusPreviewer:120): GStreamer-CRITICAL **: 23:50:59.700: gst_mini_object_unref: assertion 'GST_MINI_OBJECT_REFCOUNT_VALUE (mini_object) > 0' failed
are outputted, then I get a segfault.