Original patch is designed by Werner Lemberg. Extra part for otvalid and gxvalid are added by suzuki toshiya, see discussion: http://lists.nongnu.org/archive/html/freetype-devel/2014-12/msg00002.html http://lists.nongnu.org/archive/html/freetype-devel/2014-12/msg00007.html * include/internal/ftvalid.h: Introduce FT_THROW() in FT_INVALID_(). * src/gxvalid/gxvcommn.h: Ditto. * src/otvalid/otvcommn.h: Ditto.