ValueConditionBuilder to return FalseCondition for non-supported DataIte...

- `SMWDIGeoCoord` \ `_geo`
- `SMW\DIConcept`

Avoids an exception for when `null` is returned which surfaced during the encounter with [0].

This fixes #500 in a way that it doesn't raise an exception and returns a `FalseCondition`. In future someone can implement a proper `SemanticMaps` \ `Geo` integration using [1, 2, 3].

[0] https://github.com/SemanticMediaWiki/SemanticMaps/pull/29
[1] http://www.opengeospatial.org/standards/geosparql
[2] http://jena.apache.org/documentation/query/spatial-query.html
[3] http://www.w3.org/2003/01/geo/wgs84_pos#