fix some uninitialized members

git-svn-id: https://svn.code.sf.net/p/libtorrent/code/trunk@9548 a83610d8-ad2a-0410-a6ab-fc0612d85776
fix potential buffer overrun in unit test

git-svn-id: https://svn.code.sf.net/p/libtorrent/code/trunk@9549 a83610d8-ad2a-0410-a6ab-fc0612d85776
fix memory leak in uTP

git-svn-id: https://svn.code.sf.net/p/libtorrent/code/trunk@9550 a83610d8-ad2a-0410-a6ab-fc0612d85776