fix potential execution bug when nvim_win_close raises exception

lua/fzf-lua/win.lua

@@ -793,7 +793,10 @@ function FzfWin:close()
   self.closing = true
   self:close_preview()
   if self.fzf_winid and vim.api.nvim_win_is_valid(self.fzf_winid) then
-    vim.api.nvim_win_close(self.fzf_winid, {force=true})
+    -- run in a pcall due to potential errors while closing the window
+    -- Vim(lua):E5108: Error executing lua
+    -- experienced while accessing 'vim.b[]' from my statusline code
+    pcall(vim.api.nvim_win_close, self.fzf_winid, {force=true})
   end
   if self.fzf_bufnr and vim.api.nvim_buf_is_valid(self.fzf_bufnr) then
     vim.api.nvim_buf_delete(self.fzf_bufnr, {force=true})