92: When writing the buffer, the underlying array is to be used, not the actual ByteBuffer

Contributed-by: jfdenise
Reviewed-by: asquare

src/main/java/net/java/avatar/js/buffer/StringDecoder.java

@@ -62,7 +62,7 @@ public class StringDecoder {
     public String write(Buffer buffer) {
         // The received buffer can be fully consumed
         ByteBuffer buff = ByteBuffer.allocate(buffer.capacity());
-        buff.put(buffer.underlying());
+        buff.put(buffer.array());
         buff.flip();
         ByteBuffer nBuffer = buff;
         if (remaining != null) {