Fix type error when downloading drive root

www/common/onlyoffice/inner.js

@@ -1406,15 +1406,17 @@ define([
                             }
                             break;
                         case "cursor":
-                            cursor.updateCursor({
+                            if (cursor && cursor.updateCursor) {
-                                type: "cursor",
+                                cursor.updateCursor({
-                                messages: [{
+                                    type: "cursor",
-                                    cursor: obj.cursor,
+                                    messages: [{
-                                    time: +new Date(),
+                                        cursor: obj.cursor,
-                                    user: myUniqueOOId,
+                                        time: +new Date(),
-                                    useridoriginal: myOOId
+                                        user: myUniqueOOId,
-                                }]
+                                        useridoriginal: myOOId
-                            });
+                                    }]
+                                });
+                            }
                             break;
                         case "getLock":
                             handleLock(obj, send);

www/common/sframe-common-file.js

@@ -698,7 +698,7 @@ define([
             var ctx = {
                 fileHost: privateData.fileHost,
                 get: common.getPad,
-                sframeChan: sframeChan,
+                sframeChan: common.getSframeChannel(),
                 cache: common.getCache()
             };