[phobos] [D-Programming-Language/phobos] 0c28c7: fix issue 14920

[GitHub via phobos]

  Branch: refs/heads/stable
  Home:   https://github.com/D-Programming-Language/phobos
  Commit: 0c28c7717437b10570677994112fc874e196d26a
      https://github.com/D-Programming-Language/phobos/commit/0c28c7717437b10570677994112fc874e196d26a
  Author: tobias <tobias.stengel at student.kit.edu>
  Date:   2015-08-15 (Sat, 15 Aug 2015)

  Changed paths:
    M std/container/slist.d

  Log Message:
  -----------
  fix issue 14920


  Commit: aac09abf0a8f8624e81bbac4ded38b941cc768d9
      https://github.com/D-Programming-Language/phobos/commit/aac09abf0a8f8624e81bbac4ded38b941cc768d9
  Author: Steven Schveighoffer <schveiguy at yahoo.com>
  Date:   2015-08-16 (Sun, 16 Aug 2015)

  Changed paths:
    M std/container/slist.d

  Log Message:
  -----------
  Merge pull request #3557 from tosttost/issue_14920

fix issue 14920 - [REG2.067.0] SList.insertAfter on uninitialized list triggers assertion in _first targeting stable branch


Compare: https://github.com/D-Programming-Language/phobos/compare/b82986e64fbb...aac09abf0a8f