Initializing InputHandler with handleTouch=false leads to crash on Update

[cassdeckard]

Environment: MacOS Ventura / M1 (arm64)

Repro steps:

1. Build and Run the Demo. Note that it runs just fine.
2. In MlemGame.LoadContent(), modify the initialization of this.InputHandler to set the optional handleX parameters as follows:

   this.InputHandler = new InputHandler(this, true, true, false, false); // everything true but handleTouch

3. Build and Run again. Note the following runtime error:

   
   "/path/to/mlem/clone/MLEM/Demos.DesktopGL/bin/Debug/net7.0/MLEM Desktop Demos"
   Unhandled exception. System.NullReferenceException: Object reference not set to an instance of an object.
   at MLEM.Ui.UiControls.Update() in /path/to/mlem/clone/MLEM/MLEM.Ui/UiControls.cs:line 226
   at MLEM.Ui.UiSystem.Update(GameTime time) in /path/to/mlem/clone/MLEM/MLEM.Ui/UiSystem.cs:line 274
   at Microsoft.Xna.Framework.Game.<>c.<.cctor>b__116_1(IUpdateable updateable, GameTime gameTime)
   at Microsoft.Xna.Framework.Game.SortingFilteringCollection`1.ForEachFilteredItem[TUserData](Action`2 action, TUserData userData)
   at Microsoft.Xna.Framework.Game.Update(GameTime gameTime)
   at MLEM.Startup.MlemGame.DoUpdate(GameTime gameTime) in /path/to/mlem/clone/MLEM/MLEM.Startup/MlemGame.cs:line 144
   at Demos.GameImpl.DoUpdate(GameTime gameTime) in /path/to/mlem/clone/MLEM/Demos/GameImpl.cs:line 117
   at MLEM.Startup.MlemGame.Update(GameTime gameTime) in /path/to/mlem/clone/MLEM/MLEM.Startup/MlemGame.cs:line 102
   at Microsoft.Xna.Framework.Game.DoUpdate(GameTime gameTime)
   at Microsoft.Xna.Framework.Game.Run(GameRunBehavior runBehavior)
   at Microsoft.Xna.Framework.Game.Run()
   at Demos.DesktopGL.Program.Main() in /path/to/mlem/clone/MLEM/Demos.DesktopGL/Program.cs:line 19

[Ellpeck]

Thanks for the report!

Keep in mind that you can use the private NuGet feed to get this fix for your project if you're using NuGet for your project!