codetools: linkscanner: do not use currentdir as fallback

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@45234 4005530d-fff6-0310-9dd1-cebe43e6787f
codetools: FindDiskFilename: do not trim spaces at end

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@45235 4005530d-fff6-0310-9dd1-cebe43e6787f