[pvr/epg] stop the EPG updater, but don't unload EPG data when stoppi…

…ng the PVR manager. fixes missing EPG in some situations, like when stopping and restarting the manager

xbmc/pvr/PVRManager.cpp

@@ -179,7 +179,7 @@ void CPVRManager::Stop(void)
   SetState(ManagerStateStopping);
 
   /* stop the EPG updater, since it might be using the pvr add-ons */
-  g_EpgContainer.Unload();
+  g_EpgContainer.Stop();
 
   CLog::Log(LOGNOTICE, "PVRManager - stopping");