Fix Issue 57: we cannot simply add offsets to a void *.

* outgoing.c:
  (socket_writev): cast iov_base properly, in order to increment it

Patch by: dongsheng song


git-svn-id: https://svn.apache.org/repos/asf/serf/tags/0.4.0@1698894 13f79535-47bb-0310-9956-ffa450edef68
1 file changed