start of whichever baseclass it resides in, as a sanity measure - iff
we have debugging information for that baseclass. */
- vbasetype = TYPE_VPTR_BASETYPE (type);
+ vbasetype = check_typedef (TYPE_VPTR_BASETYPE (type));
vbasetype_vptr_fieldno = get_vptr_fieldno (vbasetype, NULL);
if (vbasetype_vptr_fieldno >= 0