ignore size unit for linear-gradient() when node-canvas is not available
ignore size unit for linear-gradient() when node-canvas is not available

seleckis/nib-pushup,tj/nib,seleckis/nib-pushup,F4-Group/nib,F4-Group/nib,ilovezy/nib,JulianWielga/stylus-less,tj/nib,rstacruz/nib,ilovezy/nib,ecmartinez/nib,ecmartinez/nib