miscellaneous bug fixes


git-svn-id: svn://svn.tuxfamily.org/svnroot/tesseract/main@1934 b412e182-2ed4-4078-95c4-27dc59f57fa9
renderrefractmask fix


git-svn-id: svn://svn.tuxfamily.org/svnroot/tesseract/main@1935 b412e182-2ed4-4078-95c4-27dc59f57fa9
packvslot fix


git-svn-id: svn://svn.tuxfamily.org/svnroot/tesseract/main@1936 b412e182-2ed4-4078-95c4-27dc59f57fa9