Handles barely work now, mostly no crashes

GlitchyEngine/src/World/MeshRendererComponent.bf

@@ -7,7 +7,7 @@ namespace GlitchyEngine.World
 	/// A component that allows to render a mesh.
 	public struct MeshRendererComponent// : IDisposableComponent
 	{
-		private AssetHandle<Material> _material;
+		private AssetHandle<Material> _material = .Invalid;
 
 		public AssetHandle<Material> Material
 		{

GlitchyEngine/src/World/Scene.bf

@@ -445,7 +445,7 @@ namespace GlitchyEngine.World
 
 			for (var (entity, transform, mesh, meshRenderer) in _ecsWorld.Enumerate<TransformComponent, MeshComponent, MeshRendererComponent>())
 			{
-				if (mesh.Mesh == null || meshRenderer.Material == null)
+				if (mesh.Mesh == .Invalid || meshRenderer.Material == .Invalid)
 					continue;
 
 				Renderer.Submit(mesh.Mesh, meshRenderer.Material, entity, transform.WorldTransform);