Better error message in response to invalid chainsetup given to -s option.
Better error message in response to invalid chainsetup given to -s option.

jeremysalwen/Ecasound-LV2,jeremysalwen/Ecasound-LV2,jeremysalwen/Ecasound-LV2,jeremysalwen/Ecasound-LV2,jeremysalwen/Ecasound-LV2