When date fields are null, no data is diplayed

[GoogleCodeExporter]

What steps will reproduce the problem?
1. Create a table with a column that uses date-range filtering
2. Have some of those columns null

What is the expected output? What do you see instead?
A table populated with all the data. No data

What version of the product are you using? On what operating system?
1.5.6, windows 8.1

Please provide any additional information below.

Original issue reported on code.google.com by robert.f...@gmail.com on 29 Jul 2015 at 7:58