[Kst-plot/kst] be7f45: Fix windows build.

[Barth Netterfield]

  Branch: refs/heads/master
  Home:   https://github.com/Kst-plot/kst
  Commit: be7f45a9a526ed2fe9320e87dc0a3030eb4d99f5
      https://github.com/Kst-plot/kst/commit/be7f45a9a526ed2fe9320e87dc0a3030eb4d99f5
  Author: Barth Netterfield <netterfield at astro.utoronto.ca>
  Date:   2016-12-22 (Thu, 22 Dec 2016)

  Changed paths:
    M src/libkstmath/psdcalculator.h

  Log Message:
  -----------
  Fix windows build.