* rm EndAddr from the TTinyHeapBlock structure. This:
  1) fixes a bug, which causes the next TTinyHeapBlock to be overwritten after
     freeing a memory block, allocated by GetMem(sizeof(pointer)). This bug was
     exposed after r28391, but was present before that; this commit only made
     the damage worse and, therefore, more visible.
  2) brings the internal heap structure closer to the TP7 heap.



git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@28416 3ad0048d-3df7-0310-abae-a5850022a9f2