Patch from bug 23867 - fix compilation in fpc 2.7.1

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@40286 4005530d-fff6-0310-9dd1-cebe43e6787f
Patches from bugs 23866 and 23864, fixes 64 bits and fc 2.7.1 issues

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@40287 4005530d-fff6-0310-9dd1-cebe43e6787f