[rtmpdump] rtmpsuck patches

Hi, I've been using rtmpsuck lately and I have 2 patches which could be pushed into master. I don't know who is the current maintainer, so I'm sending those to the rtmpdump mailing list. The 1st one fixes an invalid free. And the 2nd one adds support for clients which set the chunk size before the connect invoke command arrives. br, Matus Uzak