misc cleanup

src/nu/Render.zig

@@ -56,7 +56,7 @@ pub fn teardown() void {
     au.deinit();
 }
 
-pub fn render(engine: anytype) !void {
+pub fn render() !void {
     const flight: au.Flights.Flight = flights.next();
     try flight.wait();
 
@@ -84,7 +84,7 @@ pub fn render(engine: anytype) !void {
 
         // todo manage frame in flight state for each hook; pass the current flight in as context.
 
-        engine.invoke("present", .{cmd});
+        nu.engine.invoke("present", .{cmd});
 
         target.end_rendering(cmd);
         try cmd.endCommandBuffer();