Fix crashing on close, remove file that somehow magically appeared?

Entities/Player.Rendering.cs

@@ -12,6 +12,7 @@ namespace ClassicalSharp {
 		protected internal int PlayerTextureId = -1, MobTextureId = -1;
 		
 		public override void Despawn() {
+			if( api == null ) return;
 			api.DeleteTexture( ref PlayerTextureId );
 			api.DeleteTexture( ref nameTex.ID );
 		}

OpenTK/BindingsBase.cs

@@ -53,16 +53,17 @@ namespace OpenTK {
 				del = null;
 			}
 		}
+		
+		protected bool IsInvalidAddress( IntPtr address ) {
+			return address == IntPtr.Zero || address == new IntPtr(1) ||
+				address == new IntPtr(2) || address == new IntPtr(-1);
+		}
 
-		// Creates a System.Delegate that can be used to call a dynamically exported OpenGL function.		
+		// Creates a System.Delegate that can be used to call a dynamically exported OpenGL function.
 		protected internal void GetExtensionDelegate<T>( string name, out T del ) where T : class {
 			IntPtr address = GetAddress( name );
-			if (address == IntPtr.Zero || address == new IntPtr(1) ||
+			del = IsInvalidAddress( address ) ? null :
-			    address == new IntPtr(2) || address == new IntPtr(-1)) {
+				(T)(object)Marshal.GetDelegateForFunctionPointer( address, typeof( T ) );
-				del = null;
-				return;
-			}
-			del = (T)(object)Marshal.GetDelegateForFunctionPointer( address, typeof(T) );
 		}
 	}
 }

Utils/MinimalEnvRenderer.cs

@@ -1,40 +0,0 @@
-using System;
-
-namespace ClassicalSharp.Renderers {
-
-	/// <summary> Minimialistic environment renderer - only sets the clear colour to be sky colour.
-	/// (no fog, clouds, or proper overhead sky) </summary>
-	public class MinimalEnvRenderer : EnvRenderer {
-		
-		public MinimalEnvRenderer( Game window ) {
-			Window = window;
-			Map = Window.Map;
-		}
-		
-		public override void Render( double deltaTime ) {
-			Graphics.ClearColour( Map.SkyCol );
-		}
-		
-		public override void Init() {
-			base.Init();
-			Graphics.Fog = false;
-			Graphics.ClearColour( Map.SkyCol );
-		}
-		
-		public override void OnNewMap( object sender, EventArgs e ) {
-		}
-		
-		public override void OnNewMapLoaded( object sender, EventArgs e ) {
-			Graphics.ClearColour( Map.SkyCol );
-		}
-		
-		protected override void CloudsColourChanged() {
-		}
-		
-		protected override void FogColourChanged() {
-		}
-		
-		protected override void SkyColourChanged() {
-		}
-	}
-}