buffer_clear_region_channel ignores preserve level

[catfact]

reported on lines:
https://llllllll.co/t/norns-2-0-softcut/20550/281?u=graymazes

use of buffer_clear_region_channel

the parameter reduction_level is between 0 and 1

here the preserve variable has no effect / the same effect as 0:

function gain_reduction()
  local preserve = 1 - params:get("reduction_level")
  softcut.buffer_clear_region_channel(1, splice[active_splice].s, splice[active_splice].l, 0.01, preserve) 
end

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it looks to me like these argument count checks are maybe off by one. since arg count is never >5, preserve arg is therefore never read.

https://github.com/monome/norns/blob/main/crone/src/OscInterface.cpp#L722-L730

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incidentally i don't think this OSC method is ever used anymore, so it's dead code and should be deleted

https://github.com/monome/norns/blob/main/crone/src/OscInterface.cpp#L688-L693

(unless... is it possible that scripts are sending crone OSC directly?)

[catfact]

resolved by #1656 , yes?