* Win64 SEH: when creating a finalization procedure, put its def into the same symtable with sym. By default, defs are added into symtablestack.top, which may be set to something temporary like exceptsymtable. In such cases it is possible that def is destroyed before sym, leaving sym with invalid pointers.

git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@26077 3ad0048d-3df7-0310-abae-a5850022a9f2