It is now possible to use const shaders

A non-constant shader is no longer required to bind or to send uniform


Former-commit-id: 8fd7c03b65a2d9fcea69516c023fee034299148c

src/Nazara/Renderer/Material.cpp

@@ -30,7 +30,7 @@ NzMaterial::~NzMaterial()
 
 void NzMaterial::Apply() const
 {
-	NzShader* shader = NzRenderer::GetShader();
+	const NzShader* shader = NzRenderer::GetShader();
 	#if NAZARA_RENDERER_SAFE
 	if (!shader)
 	{