Add hhea-table support
diff --git a/src/hb-open-type-private.hh b/src/hb-open-type-private.hh
index ae44ed7..8143b28 100644
--- a/src/hb-open-type-private.hh
+++ b/src/hb-open-type-private.hh
@@ -392,6 +392,12 @@
typedef IntType<uint32_t> ULONG; /* 32-bit unsigned integer. */
typedef IntType<int32_t> LONG; /* 32-bit signed integer. */
+/* 16-bit signed integer (SHORT) that describes a quantity in FUnits. */
+typedef SHORT FWORD;
+
+/* 16-bit unsigned integer (USHORT) that describes a quantity in FUnits. */
+typedef USHORT UFWORD;
+
/* Date represented in number of seconds since 12:00 midnight, January 1,
* 1904. The value is represented as a signed 64-bit integer. */
struct LONGDATETIME
