Properly Assign LanLinkProvider as the Parent of its child objects

Summary: This is not a hugely important change. I noticed it while I was working on something else, and it seems like it ought to be this way

Test Plan: Nothing should be noticeably different

Reviewers: #kde_connect, albertvaka

Reviewed By: #kde_connect, albertvaka

Subscribers: apol, kdeconnect

Tags: #kde_connect

Differential Revision: https://phabricator.kde.org/D16468

core/backends/lan/lanlinkprovider.cpp

@@ -46,6 +46,8 @@
 
 LanLinkProvider::LanLinkProvider(bool testMode)
     : m_testMode(testMode)
+    , m_udpSocket(this)
+    , m_combineBroadcastsTimer(this)
 {
     m_tcpPort = 0;