[Orgmode] clocktable and ":step day" with: how to avoid tables with total time *0:00*

[Rainer Stengele]

Hi all!

Creating clocktables for each day of a month is an excellent feature in org!
Problem for me is that many resulting tables have a total time of 0:00.
The problem is not really the zero time I spent but the appearance of the 
tables with zero total time.

Is there a possibility to skip getting such tables?
Rational: I do not need to show my boss or customer days where I spent 0:00 
time on the project.

Anybody has the same requirement? How do others deal with this?

Rainer