Adds check for EOF

[johnjaylward]

What problem does this code solve?
See PR #447
Adds a check for EOF in Tokener.nextValue() before calling back().

Risks
Low. Should not affect callers

Changes to the API?
No.

Will this require a new release?
No.

Should the documentation be updated?
No.

Does it break the unit tests?
No. New unit tests added, see stleary/JSON-Java-unit-test#91

Was any code refactored in this commit?
No

Review status
APPROVED

[stleary]

Looks OK, but I am seeing this error:
git pull https://github.com/johnjaylward/JSON-java.git FixEOF
warning: no common commits
remote: Enumerating objects: 6, done.
remote: Counting objects: 100% (6/6), done.
remote: Compressing objects: 100% (6/6), done.
remote: Total 1093 (delta 1), reused 2 (delta 0), pack-reused 1087
Receiving objects: 100% (1093/1093), 762.75 KiB | 1.17 MiB/s, done.
Resolving deltas: 100% (660/660), done.
From https://github.com/johnjaylward/JSON-java

• branch FixEOF -> FETCH_HEAD
  fatal: refusing to merge unrelated histories

[johnjaylward]

I don't see any issue on my side, or on GitHub. Are you on the master branch?

[stleary]

Now it is working. Approved, starting 3 day comment window.