The FilterRange filter does not work with a zero value

[jaroslavlibal]

The FilterRange filter does not work correctly when one (or both) of the limit values equals to 0 (zero).

Steps to reproduce:

1. Add the number (or text) column to the datagrid.
2. Add the FilterRange filter using the ->setFilterRange() method.
3. Seed the datasource with random numbers (positive and negative).
4. Use the '0' value as the "to" limit.
5. The filter is not applied.

The same issue occurs when the "from" limit value is set to '0'.

Affected DataSources:

• DoctrineCollectionDataSource
• DoctrineDataSource
• NetteDatabaseTableDataSource
• NextrasDataSource

[paveljanda]

A really appreciate a perfect issue description!

[paveljanda]

I will have a look at it.