vm_method.c: fix a warning

* vm_method.c (rb_add_method_iseq): use rb_method_iseq_t, as
  rb_method_definition_set refers, with a cast to suppress a
  warning.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@67494 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

vm_method.c

@@ -670,13 +670,8 @@ rb_add_method(VALUE klass, ID mid, rb_method_type_t type, void *opts, rb_method_
 MJIT_FUNC_EXPORTED void
 rb_add_method_iseq(VALUE klass, ID mid, const rb_iseq_t *iseq, rb_cref_t *cref, rb_method_visibility_t visi)
 {
-    struct { /* should be same fields with rb_method_iseq_struct */
-        rb_iseq_t *iseqptr;
-	rb_cref_t *cref;
-    } iseq_body;
+    rb_method_iseq_t iseq_body = {(rb_iseq_t *)iseq, cref};
 
-    iseq_body.iseqptr = iseq;
-    iseq_body.cref = cref;
     rb_add_method(klass, mid, VM_METHOD_TYPE_ISEQ, &iseq_body, visi);
 }