feat(ui): allow to set the highlight namespace per window

- reimplement 'winhl' in terms of highlight namespaces
- check for EOF in screen tests (to indicate a likely crash)

1 files changed, 1 insertions, 0 deletions

diff --git a/src/nvim/decoration_provider.h b/src/nvim/decoration_provider.h
index 3ec7c80357..dd1ed6c581 100644
--- a/src/nvim/decoration_provider.h
+++ b/src/nvim/decoration_provider.h
@@ -13,6 +13,7 @@ typedef struct {
   LuaRef redraw_end;
   LuaRef hl_def;
   int hl_valid;
+  bool hl_cached;
 } DecorProvider;
 
 typedef kvec_withinit_t(DecorProvider *, 4) DecorProviders;