Dependencies omitted when multiple component extensions are defined

[phdmakk]

Given a component type specification extending multiple component types, only one of the extended types is added as a dependency, e.g.

    type component CT1 {};
    type component CT2 extends CT1, CT3, CT4 {};
    type component CT3 extends CT5, CT6 {};
    type component CT4 {};
    type component CT5 {};
    type component CT6 {};