[Kst] [Kst-plot/kst] c0ed21: Fix crash in Zoom Mean Centered and shared axis bo...

[Barth Netterfield]

  Branch: refs/heads/master
  Home:   https://github.com/Kst-plot/kst
  Commit: c0ed2122f4eca7ed5f21e0a3f287692e58c3b771
      https://github.com/Kst-plot/kst/commit/c0ed2122f4eca7ed5f21e0a3f287692e58c3b771
  Author: Barth Netterfield <netterfield at astro.utoronto.ca>
  Date:   2014-12-04 (Thu, 04 Dec 2014)

  Changed paths:
    M src/libkstapp/plotitem.cpp
    M src/libkstapp/sharedaxisboxitem.cpp
    M src/libkstapp/sharedaxisboxitem.h

  Log Message:
  -----------
  Fix crash in Zoom Mean Centered and shared axis boxes.