bpsrender ignores audio of scene strips

[tuffnerdstuff]

I'm submitting a...

• Bug report.
• Feature request.

Bug report

What is the current behavior?
When I render a scene containing a scene strip which contains audio, then the resulting video won't contain the audio of the scene strip.

What is the expected behavior?
Scene strips with audio should be supported.

Tell us the steps to reproduce the bug, and if possible share a minimal demo of the problem.

1. Create a new VSE project
2. Add new Scene (name: "Embedded")
3. In "Embedded" choose Video Editing and a video file with sound
4. Change back to main scene "Scene"
5. Choose Video Editing and add a scene strip
6. Choose "Embedded"
7. Save Project to "bug.blend"
8. Render "bug.blend" using bpsrender