[gnet] GConn and embedded NULLs

["Samuel Cormier-Iijima" <sciyoshi gmail com>]

Hi everyone, for some reason I'm having problems reading and writing
strings with embedded NULLs using gnet_conn_write. It works if I
switch it to use something that is not NULL. Is there a reason for
this? I looked through the code but couldn't find the culprit. I'll
try to come up with a test case later too. Thanks alot,
Samuel Cormier-Iijima