Win32: fix Edit SelStart/SelLength for MBC charsets (issue #0019716)


git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@46041 4005530d-fff6-0310-9dd1-cebe43e6787f
Win32: fix Win32MemoStrings Insert/Delete/SelStart/LineStart/LineLength for MBC charsets (issue #0019716)


git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@46042 4005530d-fff6-0310-9dd1-cebe43e6787f