merge revision(s) 48417: [Backport #10509]

	* vm_eval.c (rb_yield_splat): add missing GC guard
	  [Bug #10509]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_0_0@48491 b2dd03c8-39d4-4d8f-98ff-823fe69b080e