properly clean up gui on window close, remove some debugging messages

pd/nw/pdgui.js

@@ -853,7 +853,7 @@ function gui_window_close(cid) {
         nw_close_window(nw_win);
     });
     // remove reference to the window from patchwin object
-    patchwin[cid] = null;
+    set_patchwin(cid, null);
     loading[cid] = null;
 }
 
@@ -1261,7 +1261,7 @@ exports.get_patchwin = function(name) {
     return patchwin[name];
 }
 
-exports.set_patchwin = function(cid, win) {
+var set_patchwin = function(cid, win) {
     patchwin[cid] = win;
     if (win) {
         gui.add(cid, win);
@@ -1270,6 +1270,8 @@ exports.set_patchwin = function(cid, win) {
     }
 }
 
+exports.set_patchwin = set_patchwin;
+
 exports.get_dialogwin = function(name) {
     return dialogwin[name];
 }
@@ -5190,8 +5192,6 @@ function gui_undo_menu(cid, undo_text, redo_text) {
     // there may be some calls to subpatches after updating a dialog
     // (like turning on GOP) which call this for a canvas that has
     // been destroyed.
-    gui(cid);
-    post("the thing is " + gui(cid).get_elem);
     gui(cid).get_nw_window(function(nw_win) {
         if (cid !== "nobody") {
             nw_win.window.nw_undo_menu(undo_text, redo_text);