merge revision(s) r47037: [Backport #10106]

	* vm_insnhelper.c (vm_call_method): unusable super class should cause
	  method missing when BasicObject is refined but not been using.
	  [ruby-core:64166] [Bug #10106]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_1@47256 b2dd03c8-39d4-4d8f-98ff-823fe69b080e