Fix zephir generate View error

Error: Zephir\CompilerException: Cannot read variable 'cache_mode'
because it wasn't declared in
/home/vagrant/cphalcon-2.x.x/phalcon/mvc/view.zep on line 608
Fix zephir Generate libmemcached errors

Error: Zephir\CompilerException: Variable 'servers' cannot be read
because it's not initialized in
/home/vagrant/cphalcon-2.x.x/phalcon/session/adapter/libmemcached.zep on
line 87