Easier to read.

[ xemul: There's a silent change in how sk buffer is read in -- before
  the patch there was a static buffer for data, now this thing is
  xrealloc-ed ]
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>