* variable.c (set_const_visibility): Module#private_constant has
	  changed the visibility of only the first argument.  Now it changes
	  all of them.  [ruby-list:48558]

	* test/ruby/test_module.rb: add a test for above.

	* variable.c (set_const_visibility): print a warning when no argument
	  is passwd to Module#private_constant.  [ruby-list:48558]

	* vm_method.c (set_method_visibility): ditto for
	  Module#private_class_method.

	* variable.c (set_const_visibility): clear inine-cache when constant's
	  visibility is modified. [ruby-dev:44929]

	* test/ruby/test_module.rb (test_private_constants_clear_inlinecache):
	  add test for it.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_9_3@34579 b2dd03c8-39d4-4d8f-98ff-823fe69b080e