Actual behaviour

4D Pointsets have same points at every timestep

Expected behaviour

Save 4D pointset correctly.

Cause of the bug

PointSetWriter used only the pointset of time step 0 for saving it.

Proposed solution

Use the correct pointset dependent on the current time step.

Affected classes

mitk\Core\Code\IO\mitkPointSetWriter.cpp

How will the bugfix get tested?

By user