feat: 设置为开机自启动，异常退出后自动拉起

设置为开机自启动，异常退出后自动拉起

Log:
Task: https://pms.uniontech.com/task-view-142733.html
Influence: 开机自启动，退出自动被拉起
Change-Id: I5c9f8ef80e8a4f5fed2aa9bb59de09455a165360

src/modules/dock/entry.cpp

@@ -635,7 +635,7 @@ void Entry::active(uint32_t timestamp)
         // X11环境
         XWindow xid = winInfo->getXid();
         WindowInfoBase *activeWin = dock->getActiveWindow();
-        if (xid != activeWin->getXid()) {
+        if (activeWin && xid != activeWin->getXid()) {
             dock->doActiveWindow(xid);
         } else {
             bool found = false;