AsyncHttpClient/async-http-client — pull request #781 by yanns (2014-12-17 12:53:41+00:00)
Title: avoid writing 2 new lines without content

Fix the following error happening on the server side:
java.lang.NullPointerException: null
at org.jboss.netty.handler.codec.http.HttpClientCodec$Decoder.isContentAlwaysEmpty(HttpClientCodec.java:179) ~[netty-3.9.2.Final.jar:na]