refs #1569: avoid platform dependency of SIZEOF_LONG (and other)

Since a build/configure system can not be expected on all platforms all preprocessor size macros are removed and checked at run-time.

git-svn-id: https://svn.modelica.org/projects/Modelica/trunk@7863 7ce873d0-865f-4ce7-a662-4bb36ea78beb