merge revision(s) 39877,39881: [Backport #8153] [Backport #8154]

	* array.c: Avoid zip bug by not using obsolete rb_check_block_call
	  [Bug #8153]

	* vm_eval.c (check_funcall_respond_to): preserve passed_block, which
	  is modified in vm_call0_body() via vm_call0(), and caused a bug of
	  rb_check_funcall() by false negative result of rb_block_given_p().
	  re-fix [ruby-core:53650] [Bug #8153].
	  [ruby-core:53653] [Bug #8154]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_0_0@40281 b2dd03c8-39d4-4d8f-98ff-823fe69b080e