Fix DSO for Rapsody port:

The ap_os_dso_init() was comitted but not the call for it
inside mod_so.c. Additionally I assed an empty define
for the WIN32 platform for consistency.

Submitted by: Wilfredo Sanchez <wsanchez@apple.com>


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/1.3.x@82096 13f79535-47bb-0310-9956-ffa450edef68