patch 8.0.1373: no error when settting 'renderoptions' before starting GUI commit https://github.com/vim/vim/commit/3767c6e9ee1bd585a2afba7e932854b24d194a2d Author: Bram Moolenaar <Bram@vim.org> Date: Tue Dec 5 16:57:56 2017 +0100 patch 8.0.1373: no error when settting 'renderoptions' before starting GUI Problem: No error when settting 'renderoptions' to an invalid value before starting the GUI. Solution: Always check the value. (Ken Takata, closes #2413)