vim: colors: fix simu-gcs to not produce errors on u1804/vim80
vim: colors: fix simu-gcs to not produce errors on u1804/vim80

Signed-off-by: Simon Gerber <13ba2e9de9ead0ea0b5f47504fb3a80bb9b1ee3b@inf.ethz.ch>

simu/dotfiles,simu/dotfiles