fix(live_grep): when winopts is function (#2493)

Author: ibhagwan

lua/fzf-lua/providers/grep.lua

@@ -63,7 +63,7 @@ local function normalize_live_grep_opts(opts)
   -- disable treesitter as it collides with cmd regex highlighting
   opts = opts or {}
   opts._treesitter = false
-  if opts.winopts then opts.winopts.treesitter = nil end
+  utils.map_set(opts, "winopts.treesitter", nil)
 
   ---@type fzf-lua.config.Grep
   opts = config.normalize_opts(opts, "grep")

lua/fzf-lua/utils.lua

@@ -539,6 +539,7 @@ function M.map_set(m, k, v)
     if i == #keys then
       map[key] = v
     else
+      if type(map[key]) == "function" then break end
       map[key] = type(map[key]) == "table" and map[key] or {}
       map = map[key]
     end