NewModelItem can potentially return NULL in a number of cases, which wasn't checked for. Don't try to add them or otherwise manipulate them in such a case. Fixes CID 641.

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@37828 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/kits/tracker/FavoritesMenu.cpp

@@ -165,6 +165,9 @@ FavoritesMenu::AddNextItem()
 			BMenuItem *item = BNavMenu::NewModelItem(&model,
 				model.IsDirectory() ? fOpenFolderMessage : fOpenFileMessage,
 				fTarget);
+				
+			if (item == NULL)
+				return true;
 
 			item->SetLabel(ref.name);		// this is the name of the link in the Go dir