patch 8.0.1123: cannot define a toolbar for a window

Problem:    Cannot define a toolbar for a window.
Solution:   Add a window-local toolbar.
diff --git a/src/evalfunc.c b/src/evalfunc.c
index 8d370d4..6c2a73e 100644
--- a/src/evalfunc.c
+++ b/src/evalfunc.c
@@ -5229,6 +5229,9 @@
     dict_add_nr_str(dict, "winnr", winnr, NULL);
     dict_add_nr_str(dict, "winid", wp->w_id, NULL);
     dict_add_nr_str(dict, "height", wp->w_height, NULL);
+#ifdef FEAT_MENU
+    dict_add_nr_str(dict, "winbar", wp->w_winbar_height, NULL);
+#endif
     dict_add_nr_str(dict, "width", wp->w_width, NULL);
     dict_add_nr_str(dict, "bufnr", wp->w_buffer->b_fnum, NULL);