try to use send(,,MSG_NOSIGNAL) instead of write() wherever possible (which

try to use send(,,MSG_NOSIGNAL) instead of write() wherever possible (which
will allow us to drop the SIGPIPE check). Cache the results of the last
write()/send() to make sure that we do not issue more than necessary system
calls.

git-svn-id: file:///home/lennart/svn/public/pulseaudio/trunk@1083 fefdeb5f-60dc-0310-8127-8f9354f1896f