brought back functionality from previous builds but now cross-platform

engine/ml_video.mm

@@ -0,0 +1,13 @@
+#import <QuartzCore/CAMetalLayer.h>
+#import <Metal/Metal.h>
+
+namespace CA {
+    class MetalLayer;
+}
+
+void APPLE_ConfigureLayer(CA::MetalLayer* pMetalLayer)
+{
+	if (!pMetalLayer) return;
+
+	CAMetalLayer* nsLayer = (__bridge CAMetalLayer*)pMetalLayer;
+};