fix(highlight): use ctermbg/fg instead of bg/fg when use_rgb=false #18982

If `use_rgb` was false, we would attempt to set the `cterm_bg_color` to the
variable `bg`, which is only retrieved from `bg` and `background` keys, not
`ctermbg`. Same for `fg`. This means the values would be `-1` (the default,
un-got value) and we'd always set the returned values to `0`.

My understanding is `fg/bg` is always "gui" values, so instead we should be
using `ctermbg` when needed.

Nb: when looking around I think this function is currently *always* called with
`use_rgb = true`.

0 files changed, 0 insertions, 0 deletions