* gc.c (rb_data_object_alloc): check klass only if klass is not 0.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@40686 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,7 @@
+Mon May 13 15:24:16 2013  Koichi Sasada  <ko1@atdot.net>
+
+	* gc.c (rb_data_object_alloc): check klass only if klass is not 0.
+
 Mon May 13 14:57:28 2013  Koichi Sasada  <ko1@atdot.net>
 
 	* gc.c (rb_data_object_alloc, rb_data_typed_object_alloc):

gc.c

@@ -716,7 +716,7 @@ VALUE
 rb_data_object_alloc(VALUE klass, void *datap, RUBY_DATA_FUNC dmark, RUBY_DATA_FUNC dfree)
 {
     NEWOBJ_OF(data, struct RData, klass, T_DATA);
-    Check_Type(klass, T_CLASS);
+    if (klass) Check_Type(klass, T_CLASS);
     data->data = datap;
     data->dfree = dfree;
     data->dmark = dmark;