Header files are missing in 1.2-5

[Floris Renaud <jkfloris@dds.nl>]

The libvkd3d-headers package does not contain any header files (for 
example, vkd3d.h).

$ apt policy libvkd3d-headers
libvkd3d-headers:
  Installed: 1.2-5
  Candidate: 1.2-5
  Version table:
 *** 1.2-5 100
          1 http://ftp.nl.debian.org/debian experimental/main amd64 
Packages
          1 http://ftp.nl.debian.org/debian experimental/main i386 
Packages
        100 /var/lib/dpkg/status
$ dpkg-query -L libvkd3d-headers
/.
/usr
/usr/share
/usr/share/doc
/usr/share/doc/libvkd3d-headers
/usr/share/doc/libvkd3d-headers/ANNOUNCE.gz
/usr/share/doc/libvkd3d-headers/AUTHORS
/usr/share/doc/libvkd3d-headers/README
/usr/share/doc/libvkd3d-headers/changelog.Debian.gz
/usr/share/doc/libvkd3d-headers/copyright

Have these files been moved to another package or is this a bug?