Prevent crash

app/src/main/java/eu/faircode/email/AdapterNavMenu.java

@@ -134,6 +134,7 @@ public class AdapterNavMenu extends RecyclerView.Adapter<AdapterNavMenu.ViewHold
                 return;
 
             NavMenuItem menu = items.get(pos);
+            if (menu != null)
                 menu.onClick();
         }
 
@@ -144,7 +145,7 @@ public class AdapterNavMenu extends RecyclerView.Adapter<AdapterNavMenu.ViewHold
                 return false;
 
             NavMenuItem menu = items.get(pos);
-            return menu.onLongClick();
+            return (menu != null && menu.onLongClick());
         }
     }