Merge pull request #3050 from remore/fix-minor-bug-about-objectspace

Add case statement of MRB_TT_SCLASS in mrb_obj_is_kind_of()

src/object.c

@@ -481,6 +481,7 @@ mrb_obj_is_kind_of(mrb_state *mrb, mrb_value obj, struct RClass *c)
     case MRB_TT_MODULE:
     case MRB_TT_CLASS:
     case MRB_TT_ICLASS:
+    case MRB_TT_SCLASS:
       break;
 
     default: