patch 8.1.1811: popup window color cannot be set to "Normal" commit https://github.com/vim/vim/commit/c363fe1599655232e8bd6e279fbf70d4c1b7baf6 Author: Bram Moolenaar <Bram@vim.org> Date: Sun Aug 4 18:13:46 2019 +0200 patch 8.1.1811: popup window color cannot be set to "Normal" Problem: Popup window color cannot be set to "Normal". Solution: Check for non-empty 'wincolor' instead of zero attribute. (closes #4772)