Add PT convinience variable to ba able to debug InitFinalTable

git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@23558 3ad0048d-3df7-0310-abae-a5850022a9f2
 Correct code for shared library start

git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@23559 3ad0048d-3df7-0310-abae-a5850022a9f2