#781 fixed ("Regarding quantity="Position" in MSL")
At several places a quantity of "Position" was erronously defined for a Block input/output.
This has been changed to the correct "Length" (otherwise, connection errors might occur).

git-svn-id: https://svn.modelica.org/projects/Modelica/trunk@6163 7ce873d0-865f-4ce7-a662-4bb36ea78beb