qgis/QGIS — pull request #1343 by luipir (2014-05-09 12:12:46+00:00)
Title: removed limitation to accept an empty QgsGeometry() in changeGeometryValues

due to bug:
https://hub.qgis.org/issues/10216
changed Spatialite and Postgres provider to avoid skipping empty QgsGeometry() geometries.

Tested and works as expected setting Geometry to NULL