FPGDBMIDebugger: check obj initialized

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@44309 4005530d-fff6-0310-9dd1-cebe43e6787f
FPDebug: disable wrong caching / refactor

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@44310 4005530d-fff6-0310-9dd1-cebe43e6787f