STORM-1339 FIXED Making a preventive fix for a crash in LLPanelPlaces::onTeleportButtonClicked().

indra/newview/llpanellandmarks.cpp

@@ -299,7 +299,7 @@ void LLLandmarksPanel::onTeleport()
 	}
 
 	LLFolderViewEventListener* listenerp = current_item->getListener();
-	if (listenerp->getInventoryType() == LLInventoryType::IT_LANDMARK)
+	if (listenerp && listenerp->getInventoryType() == LLInventoryType::IT_LANDMARK)
 	{
 		listenerp->openItem();
 	}

indra/newview/llpanelplaces.cpp

@@ -584,6 +584,13 @@ void LLPanelPlaces::onTeleportButtonClicked()
 	{
 		if (mPlaceInfoType == LANDMARK_INFO_TYPE)
 		{
+			if (mItem.isNull())
+			{
+				llwarns << "NULL landmark item" << llendl;
+				llassert(mItem.notNull());
+				return;
+			}
+
 			LLSD payload;
 			payload["asset_id"] = mItem->getAssetUUID();
 			LLSD args;