Handle empty JSON files gracefully
Handle empty JSON files gracefully

This ensures endptr is always set to something sensible even if the input data was completely empty.
tvanderbruggen/gason,tvanderbruggen/gason,ChrisJefferson/gason,vivkin/gason,duckie/gason,duckie/gason,bagobor/gason,ChrisJefferson/gason,vivkin/gason,ChrisJefferson/gason,bagobor/gason