[phobos] [D-Programming-Language/phobos] 8b7322: add JSONValue.isNull

[GitHub via phobos]

  Branch: refs/heads/master
  Home:   https://github.com/D-Programming-Language/phobos
  Commit: 8b7322a307bd54b6067af62ab5281bf7e846b2dc
      https://github.com/D-Programming-Language/phobos/commit/8b7322a307bd54b6067af62ab5281bf7e846b2dc
  Author: Martin Nowak <code at dawg.eu>
  Date:   2014-11-22 (Sat, 22 Nov 2014)

  Changed paths:
    M std/json.d

  Log Message:
  -----------
  add JSONValue.isNull

- short-access similar to array, str, object...
- val.type == JSON_TYPE.NULL is fairly verbose


  Commit: 0117db815223d7a9d5e2d98fbd5a2cc96ad732c5
      https://github.com/D-Programming-Language/phobos/commit/0117db815223d7a9d5e2d98fbd5a2cc96ad732c5
  Author: H. S. Teoh <hsteoh at quickfur.ath.cx>
  Date:   2014-11-22 (Sat, 22 Nov 2014)

  Changed paths:
    M std/json.d

  Log Message:
  -----------
  Merge pull request #2762 from MartinNowak/json

add JSONValue.isNull


Compare: https://github.com/D-Programming-Language/phobos/compare/85f339c8cc14...0117db815223