merge revision(s) 39451: [Backport #7925]

	* vm_insnhelper.c (vm_call_method): block level control frame does not
	  have method entry, so obtain the method entry from method top-level
	  control frame to be compared with refined method entry.
	  [ruby-core:52750] [Bug #7925]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_0_0@39672 b2dd03c8-39d4-4d8f-98ff-823fe69b080e