Fix un/bypassing Aux-send panners

This fixes issues with send-panner bypass whenever the
target bus input-count is different from the send's channel count.

--

Previously, when the aux-send panner was bypassed, data was
copied using BufferSet::read_from().
This sets the channel count of the output buffer set (here: mixbufs)
to match the input (here: bufs).

e.g. mono to stereo, "1 in -> 2 out" out was changed to "1 in -> 1 out".

Un-bypassing the panner later does not reconfigure the I/O.
Mixbufs remained mono, and PannerShell::run() "1 in -> 1 out"
does nothing. The panner was effectively not functional.

0 files changed, 0 insertions, 0 deletions