fix empty mappings again
fix empty mappings again

I incorrectly assumed that mappings automatically
end with new lines in the generated source.

garysye/source-map,spark/source-map,stealjs/source-map,webcoding/source-map,azakhary/source-map,meteor/source-map,spark/source-map,modulexcite/source-map,bitovi/source-map,stealjs/source-map,webcoding/source-map,ejpbruel/source-map,bitovi/source-map,modulexcite/source-map,azakhary/source-map,garysye/source-map,ejpbruel/source-map