lib/core/tracker/Tracker.lua: return value from director:read_*();¹ tidy.
lib/core/tracker/Tracker.lua: return value from director:read_*();¹ tidy.

1: If the class's from_object() directly returns a Match.Error(), it
needs to be set on the context.

komiga/quanta,komiga/quanta,komiga/quanta