Fix crash when deleting sound layer after scrubbing #1731
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I had another look at the sound layer deletion crash and I think I finally did figure how to fix it – or work around it, rather. Looks like it’s a bug in the DirectShow backend of Qt Multimedia that results in a segfault when it is destroyed while paused. Neither the GStreamer backend nor the Windows Media Foundation backend exhibit this behaviour. Fortunately, it’s pretty easy to work around.