NUM_NONREG_ITEMS, which have happened to be same value.
* class.c (rb_class_new): subclass check moved to this function.
* class.c (rb_class_boot): check less version of rb_class_new().
* eval.c (proc_invoke): should preserve iter status for embedded
frame in the block.
* file.c (rb_file_s_expand_path): may overrun buffer on stack.
* string.c (rb_str_insert): forgot to call rb_str_modify().
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@1621 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
