Close the recipe screen even if parent screen is null

[deirn]

When you open the recipe screen when still in world, this.parentScreen is null, making you stuck on the recipe screen with no way out.

[CLAassistant]

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[mezz]

Thanks for contributing! Can you please explain the issue in more detail? I am not sure how to reproduce the bug this is fixing.

[deirn]

So I want to make a thing that shows the recipe/usage for the block you look at. I called IRecipeManager#createFocus while the player in game, making Minecraft#currentScreen == null which makes parentScreen == null.

[mezz]

Thanks, that makes sense to me.
We used to close the player's screen in this case, but it caused a loop bug reported here: #2214
I think just setting the GUI to null should be safe here though, I'll check to see if it has any side effects.

[mezz]

Looks like it should be fine, I'll merge this as-is.