[Rpcemu] Pulseaudio has constant CPU load even when sound is disabled

Using rpcemu 0.8.14, emulating an SA-RPC running RISC OS 3.71, I notice that pulseaudio is running with a constant appreciable load (~20% of a core on my machine), which stops when I quit rpcemu.

This would be less than ideal even if I had sound switched on, but it's off!

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