Quick fix to single plotitem problem
Merge branch 'no-plotitem-fix' of https://github.com/mandli/visclaw into mandli-no-plotitem-fix

* 'no-plotitem-fix' of https://github.com/mandli/visclaw:
  Quick fix to single plotitem problem
Merge pull request #82 from rjleveque/no-plotitem-fix

No plotitem fix