[SDL2] Fix issue where changes to mutable struct were lost

diff --git a/Source/OpenTK/Platform/SDL2/Sdl2JoystickDriver.cs b/Source/OpenTK/Platform/SDL2/Sdl2JoystickDriver.cs
index e284cc5..c40562e 100644 (file)
--- a/Source/OpenTK/Platform/SDL2/Sdl2JoystickDriver.cs
+++ b/Source/OpenTK/Platform/SDL2/Sdl2JoystickDriver.cs
@@ -47,8 +47,8 @@ namespace OpenTK.Platform.SDL2
         class Sdl2GamePad
         {
             public IntPtr Handle { get; private set; }
-            public GamePadState State { get; set; }
-            public GamePadCapabilities Capabilities { get; set; }
+            public GamePadState State;
+            public GamePadCapabilities Capabilities;
 
             public Sdl2GamePad(IntPtr handle)
             {