[phobos] [D-Programming-Language/phobos] 984f3c: Revert "Add integral overload for isNaN for use in...

[GitHub via phobos]

  Branch: refs/heads/revert-2311-intnan
  Home:   https://github.com/D-Programming-Language/phobos
  Commit: 984f3c9fd102c3b0590ff8a9ea836d2f39ee4d80
      https://github.com/D-Programming-Language/phobos/commit/984f3c9fd102c3b0590ff8a9ea836d2f39ee4d80
  Author: Walter Bright <walter at walterbright.com>
  Date:   2014-07-23 (Wed, 23 Jul 2014)

  Changed paths:
    M std/math.d

  Log Message:
  -----------
  Revert "Add integral overload for isNaN for use in generic code"