Issue in Modelica.StateGraph.PartialCompositeStep fixed:
When running a PowerTrain example, an overconstrained initialization was reported. The reason is not fully clear. However, in PartialCompositeStep the initialization equation "pre(active) = pre(newActive)" is superfluous (since pre(active) is not present in this model). This initialization equation is removed with this commit and then this error in PowerTrain is gone.

git-svn-id: https://svn.modelica.org/projects/Modelica/trunk@6727 7ce873d0-865f-4ce7-a662-4bb36ea78beb