/* Analogous to GET_HDR, except that in the case of large objects, it */
/* Returns the header for the object beginning, and updates p. */
-/* Returns &GC_bad_header instead of 0. All of this saves a branch */
+/* Returns GC_invalid_header instead of 0. All of this saves a branch */
/* in the fast path. */
# define HC_GET_HDR(p, hhdr, source) \
{ \