GDEF tables need `glyph_count' too for validation. Problem reported by Chi Nguyen <chint@necsv.com>. * src/otvalid/otvgdef.c (otv_GDEF_validate), src/otvalid/otvalid.h (otv_GDEF_validate), src/otvalid/otvmod.c (otv_validate): Pass `glyph_count'.