buffer: bug fixing

Author: jknack

jooby/src/main/java/io/jooby/internal/HttpMessageEncoder.java

@@ -92,8 +92,7 @@ public BufferedOutput encode(@NonNull Context ctx, @NonNull Object value) throws
       return outputFactory.wrap(bytes);
     }
     if (value instanceof ByteBuffer buffer) {
-      ctx.send(buffer);
-      return null;
+      return outputFactory.wrap(buffer);
     }
     if (encoders != null) {
       // Content negotiation, find best:

modules/jooby-netty/src/main/java/io/jooby/internal/netty/NettyBufferedOutputFactory.java

@@ -73,7 +73,7 @@ public BufferedOutput wrap(@NonNull String value, @NonNull Charset charset) {
 
   @Override
   @NonNull public BufferedOutput wrap(@NonNull byte[] bytes, int offset, int length) {
-    return new NettyByteArrayWrappedOutput(bytes, 0, bytes.length);
+    return new NettyByteArrayWrappedOutput(bytes, offset, length);
   }
 
   @Override