modifications for Windows + VS2010

[ghost]

(includes &buffer[0] access fix when buffer.size=0) tested on Windows 7

[sandvige]

When running cql_demo on Linux, I can see this:

LOG: closing connection
LOG: error reading header Operation canceled
THE END

When doing it on Windows (using your patch):

LOG: closing connection
LOG: error reading header The I/O operation has been aborted because of either a thread exit or an application request
THE END