Fixes #14. Use default print volume when none is specified
Fixes #14. Use default print volume when none is specified

DeltaMaker/OctoPrint-Slicer,eyal0/OctoPrint-Slicer,DeltaMaker/OctoPrint-Slicer,eyal0/OctoPrint-Slicer,kennethjiang/OctoPrint-Slicer,DeltaMaker/OctoPrint-Slicer,kennethjiang/OctoPrint-Slicer,kennethjiang/OctoPrint-Slicer,eyal0/OctoPrint-Slicer