* array.c (ary_ensure_room_for_push): use RARRAY_RAWPTR() instead of
  RARRAY_PTR. In this code, there are no "write" operation.
* array.c (rb_ary_equal): ditto.
* array.c (recursive_equal): ditto.



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@42063 b2dd03c8-39d4-4d8f-98ff-823fe69b080e