Fix return to menu when playing the game normally.

[AI-WAIFU]

Currently, when compiling the binary for minetest, and opening it up to play. The "exit to menu" functionality is broken.

Steps to reproduce:

-Compile minetest
-Create world
-Join world
-Open menu
-Attempt to "exit to menu"
Expected behaviour is to return to the main menu, actual behaviour is that nothing happens.