Moved normal/tangents generation to submeshes

Former-commit-id: d043284a1a5810b429cc76d8bc071010985a523b

src/Nazara/Utility/Loaders/MD2/Loader.cpp

@@ -214,11 +214,11 @@ namespace
 		vertexBuffer->SetPersistent(false);
 		vertexBuffer.release();
 
+		subMesh->GenerateAABB();
+		subMesh->GenerateTangents();
 		subMesh->SetMaterialIndex(0);
 		mesh->AddSubMesh(subMesh.release());
 
-		mesh->GenerateTangents();
-
 		return true;
 	}
 }