[Kst-plot/kst] 76c8a3: fix image stream bug in change samples dialog.

[Barth Netterfield]

  Branch: refs/heads/master
  Home:   https://github.com/Kst-plot/kst
  Commit: 76c8a33b652e7c019eddf67e618bc2b7c8db8c72
      https://github.com/Kst-plot/kst/commit/76c8a33b652e7c019eddf67e618bc2b7c8db8c72
  Author: Barth Netterfield <netterfield at astro.utoronto.ca>
  Date:   2017-05-24 (Wed, 24 May 2017)

  Changed paths:
    M src/libkstapp/changedatasampledialog.cpp

  Log Message:
  -----------
  fix image stream bug in change samples dialog.