v6.2.1 Causes Infinite Recursion if the App's Window is Setup after SDL

[joeljfischer]

Bug Report

After the v6.2.1 lock screen fix, if an app sets up its app window after it sets up SDL, it will cause infinite recursion due to the lock screen window being the only window that exists.

Reproduction Steps

1. Setup SDL in app delegate
2. Setup window in app delegate after SDL
3. Run the app

Expected Behavior

App does not crash or gives explicit instruction to the developer on when to setup SDL.

Observed Behavior

App crashes without any way for the developer to know what's happening.

OS & Version Information

• iOS Version: n/a
• SDL iOS Version: v6.2.1
• Testing Against: n/a