find_member
sym_t *find_member(const struct_or_union *, const char *);
const sym_t *member = find_member(tp->u.sou, name);
find_member(mem->s_type->u.sou, name);
sym_t *nested_mem = find_member(sou, msym->s_name);
sym_t *mem = find_member(tp->u.sou, name);