* fixed bug in SysTinyGetMem that caused heap corruption if the free block that's being allocated is followed tightly by an already allocated block

git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@24520 3ad0048d-3df7-0310-abae-a5850022a9f2
* set the TinyHeapMinBlock const relative to the pointer size

git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@24521 3ad0048d-3df7-0310-abae-a5850022a9f2