[Kst-plot/kst] 51f690: Fix a crash case in the netcdf reader.

[Barth Netterfield]

  Branch: refs/heads/master
  Home:   https://github.com/Kst-plot/kst
  Commit: 51f690a9cb6bb16329b5bbb6d8cee3cd1e46b90b
      https://github.com/Kst-plot/kst/commit/51f690a9cb6bb16329b5bbb6d8cee3cd1e46b90b
  Author: Barth Netterfield <netterfield at astro.utoronto.ca>
  Date:   2016-08-16 (Tue, 16 Aug 2016)

  Changed paths:
    M src/datasources/netcdf/netcdfsource.cpp

  Log Message:
  -----------
  Fix a crash case in the netcdf reader.