Suspicious DIT calculation

[PolakPL2002]

The issue seems to affect classes that have static inner classes extending the outer class (and possibly more general cases as well).

Example: https://github.com/libgdx/libgdx/blob/master/gdx/src/com/badlogic/gdx/math/Interpolation.java
Calculated DIT for Interpolation: 24
Expected DIT for Interpolation: 1

The DIT of the outer class seems to include the dependencies of inner classes. It is caused by CKVisitor.java:70, which causes inner classes dependencies be added to the DIT of Interpolation (which is top of the stack at that moment).

Is this intended behavior?