[Kst] [Kst-plot/kst] 72110f: Fix crash from uninitialized variable (!)

[Barth Netterfield]

  Branch: refs/heads/master
  Home:   https://github.com/Kst-plot/kst
  Commit: 72110fc439d85c220bddca54b323fe26f87f906a
      https://github.com/Kst-plot/kst/commit/72110fc439d85c220bddca54b323fe26f87f906a
  Author: Barth Netterfield <netterfield at astro.utoronto.ca>
  Date:   2016-05-25 (Wed, 25 May 2016)

  Changed paths:
    M src/libkst/vector.cpp

  Log Message:
  -----------
  Fix crash from uninitialized variable (!)