POSIX: fix file descriptor passing
POSIX: fix file descriptor passing

The kernel sets msghdr.msg_controllen to the length of the received
control data on successful return. Thus, we need to reset this
variable to the length of the buffer before each call.


git-svn-id: dd90618784b6a4b323ea0c23a071cb1c9e6f2ac7@9471 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser