Empty <JSON> versus null

[James Powell]

Some <JSON> outputs will return empty, which is not a valid JSON value and can mess up further operations. For example:

Consider either always returning valid JSON (so a null) or have a input empty string either become null, or be treated different (such as being dropped).

[James Powell]

Actually, this is a bug. SubVI “Make empty strings null” workes on any whitespace, but not on empty string!

[James Powell]

Fixed. 9195f29954e3f7b8829fc37c832daef6c793f0f1