SQLite provider: crash when getting geometry using a Select before a DerscribeSchema

[traianstanev]

An exception gets thrown by the FdoIFeatureReader::GetGeometry() implementation in the provider, in cases where a Select is done without a DescribeSchema having been done with the same connection. The reason was that the geometry encoding type of the geometry column does not get initialized until the time FdoFeatureClasses are created for DescribeSchema purposes (i.e. initialization of the geom encoding type is way too lazy).