Fix to allow libwpd to compile again with debian-unstable.
Fix to allow libwpd to compile again with debian-unstable.

cpjreynolds/libwpd,Distrotech/librevenge,Distrotech/librevenge,cpjreynolds/libwpd,Distrotech/libpwd,Distrotech/libpwd,Distrotech/librevenge,Distrotech/librevenge,Distrotech/librevenge,Distrotech/libpwd,cpjreynolds/libwpd,Distrotech/libpwd