LazDebuggerFp (pure): Added reading of register support to TDbgMemReader.

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@44689 4005530d-fff6-0310-9dd1-cebe43e6787f
LazDebuggerFp (pure): Fixed AV on Windows

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@44690 4005530d-fff6-0310-9dd1-cebe43e6787f