Fix automatic port selection

[jiffyclub]

Fix automatic port selection

[andrew-hill]

it seems manual port selection doesn't even work:

% snakeviz --port=8081 output.log
Traceback (most recent call last):
  File "/usr/local/bin/snakeviz", line 8, in <module>
    load_entry_point('snakeviz==0.1.1', 'console_scripts', 'snakeviz')()
  File "/Library/Python/2.7/site-packages/snakeviz-0.1.1-py2.7.egg/snakeviz/cli.py", line 66, in main
    app.listen(8080, address=hostname)
  File "/Library/Python/2.7/site-packages/tornado-3.1.1-py2.7.egg/tornado/web.py", line 1463, in listen
    server.listen(port, address)
  File "/Library/Python/2.7/site-packages/tornado-3.1.1-py2.7.egg/tornado/tcpserver.py", line 117, in listen
    sockets = bind_sockets(port, address=address)
  File "/Library/Python/2.7/site-packages/tornado-3.1.1-py2.7.egg/tornado/netutil.py", line 90, in bind_sockets
    sock.bind(sockaddr)
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/socket.py", line 224, in meth
    return getattr(self._sock,name)(*args)
socket.error: [Errno 48] Address already in use

Note the second line of the traceback is still trying on 8080

[jiffyclub]

Fixed in #42 (4524aab).