stagger/specs.py (EncodingSpec.to_str): Don't fail if value is None.
stagger/specs.py (EncodingSpec.to_str): Don't fail if value is None.

Reroot/stagger,Rasor1911/stagger,SpaWnAge/stagger,deNULL/stagger,danielthesoto/stagger,Rose-Hawk/stagger,efth/stagger,penfold1992/stagger,radec94/stagger,manolomartinez/stagger