/usr/share/doc/libopenh323-dbg/changelog.Debian.gz is in libopenh323-dbg 1.18.0.dfsg-10build2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libopenh323-dbg/../libopenh323-1.18.0/changelog.Debian.gz