Don't write to error_buf if it's 0
Don't write to error_buf if it's 0

hannesgredler/json-parser,kubrickology/json-parser,davidlamprea/json-parser,davidlamprea/json-parser,e7/json-parser,hannesgredler/json-parser,kubrickology/json-parser,mofax/json-parser,mofax/json-parser,kubrickology/json-parser,e7/json-parser