Adds a test to catch setParameterised( undoable=True ) failures when called on an empty holder.
Adds a test to catch setParameterised( undoable=True ) failures when called on an empty holder.

Alwnikrotikz/cortex-vfx,AlanZatarain/cortex-vfx,tectronics/cortex-vfx,Alwnikrotikz/cortex-vfx,tectronics/cortex-vfx,AlanZatarain/cortex-vfx,AlanZatarain/cortex-vfx,Alwnikrotikz/cortex-vfx,tectronics/cortex-vfx