Bumping to Houdini Version: 13.0.401
Houdini Engine Version: 1.7 (API: 13)
Move haveGeosChanged checks from OutputGeometry to OutputGeometryObject
In OutputGeomtry constructor, call update()

This avoids duplicate code for updating the HAPI_GeoInfo.
Add some macros for error checking
Make sure OutputGeometry::myParts is initialized even when HAPI_GetGeoInfo() failed

Even when HAPI_GetGeoInfo() failed, there's always at least one part. So
we want the below code to initialize myParts.
Remove some dead code