FPDebug: fix calling nil object 

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@43427 4005530d-fff6-0310-9dd1-cebe43e6787f
FPDebug: fix calling nil object 

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@43428 4005530d-fff6-0310-9dd1-cebe43e6787f