fix ByteBuffersIO

Author: lecousin

net.lecousin.core/src/main/java/net/lecousin/framework/io/buffering/ByteBuffersIO.java

@@ -325,11 +325,13 @@ protected void closeResources(SynchronizationPoint<Exception> ondone) {
 
 	@Override
 	public int writeSync(ByteBuffer buffer) {
-		addBuffer(buffer.array(), buffer.position(), buffer.remaining());
+		addBuffer(buffer.array(), buffer.arrayOffset() + buffer.position(), buffer.remaining());
 		pos = totalSize;
 		bufferIndex = buffers.size();
 		bufferPos = 0;
-		return buffer.remaining();
+		int len = buffer.remaining();
+		buffer.position(buffer.position() + len);
+		return len;
 	}
 
 	@Override