[D-runtime] [D-Programming-Language/druntime] 99e621: fix 2 reg case

[GitHub]

  Branch: refs/heads/master
  Home:   https://github.com/D-Programming-Language/druntime
  Commit: 99e621edf2b179f5c31f58881018ca074fa87249
      https://github.com/D-Programming-Language/druntime/commit/99e621edf2b179f5c31f58881018ca074fa87249
  Author: Walter Bright <walter at walterbright.com>
  Date:   2012-06-18 (Mon, 18 Jun 2012)

  Changed paths:
    M src/core/stdc/stdarg.d

  Log Message:
  -----------
  fix 2 reg case