merge revision(s) 39169:
	  release manager finally decided to revert it.

	* eval.c (rb_ensure): preserve errinfo across ensure proc before


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_0_0@39512 b2dd03c8-39d4-4d8f-98ff-823fe69b080e