[epg] fixed - set pvr channel pointer before trying to update epg tab…

…les, and skip table updates when the pvr manager isn't started. fixes tables being deleted when they couldn't be updated and the channel pointer is invalid

xbmc/epg/EpgContainer.cpp

@@ -517,6 +517,18 @@ bool CEpgContainer::UpdateEPG(bool bOnlyPending /* = false */)
     if (bShowProgress && !bOnlyPending)
       UpdateProgressDialog(++iCounter, m_epgs.size(), epg->Name());
 
+    // we currently only support update via pvr add-ons. skip update when the pvr manager isn't started
+    if (!g_PVRManager.IsStarted())
+      continue;
+
+    // check the pvr manager when the channel pointer isn't set
+    if (!epg->Channel())
+    {
+      CPVRChannelPtr channel = g_PVRChannelGroups->GetChannelByEpgId(epg->EpgID());
+      if (channel)
+        epg->SetChannel(channel);
+    }
+
     if ((!bOnlyPending || epg->UpdatePending()) && epg->Update(start, end, m_iUpdateTime, bOnlyPending))
       iUpdatedTables++;
     else if (!epg->IsValid())