+ added the TP7-compatible pointer variables HeapOrg and HeapEnd, indicating,
  respectively, the start and end of the tiny heap. Eventually they are also
  going to be used for catching attempts to free memory that is outside the
  heap.



git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@28437 3ad0048d-3df7-0310-abae-a5850022a9f2