Yes, this is available in NPrinting 17.
First, identify a chart in the QlikView report that will only have values when there is data that meets your filters/conditions.
Then, create a Condition (App -> Condition) with the Rule that the specified chart "has values" or "has no values".
Finally, in the Task you can specify the Condition under which the email will be sent. So far, I have only been able to send out emails if there is a report file included, even if it is blank, but maybe you'll find a way around that.
Finally, once you've done all the testing, do some more testing.