if check_tcp was called with -e but not -s, it would hang in a call to my_recv. the

if check_tcp was called with -e but not -s, it would hang in a call to my_recv.  the
fix committed here adds on more piece of logic to the check to see if more data needs
to be read, avoiding the deadlock call.  a better fix would be to not use these "voodoo"
heuristics and instead use poll() or select(), but that's quite a bit more complicated.

git-svn-id: https://nagiosplug.svn.sourceforge.net/svnroot/nagiosplug/nagiosplug/trunk@1170 f882894a-f735-0410-b71e-b25c423dba1c