Minor fixes

include/Nazara/Core/ResourceLoader.inl

@@ -78,7 +78,7 @@ namespace Nz
 		if (ext[0] == '.')
 			ext.erase(ext.begin());
 
-		File file(filePath.generic_u8string()); // Open only if needed
+		File file(filePath); // Open only if needed
 
 		bool found = false;
 		for (auto& loaderPtr : m_loaders)

src/Nazara/Graphics/Systems/RenderSystem.cpp

@@ -216,6 +216,7 @@ namespace Nz
 		UpdateVisibility(registry);
 		UpdateInstances(registry);
 
+		if (!m_cameraEntities.empty())
 			m_pipeline->Render(renderFrame);
 	}