* variable.c (rb_obj_classname): wrong tail recursion.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@3428 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

variable.c

@@ -315,7 +315,7 @@ char *
 rb_obj_classname(obj)
     VALUE obj;
 {
-    return rb_obj_classname(obj);
+    return rb_class2name(CLASS_OF(obj));
 }
 
 struct trace_var {