NT Cleanup. Remove allow for functions called by spawn_child_err

to return if the exec under UNIX fails and let s_c_e take care of the exit. NT
requires a return value, but a return value under UNIX simply means the process
could not be execed


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/1.3.x@78316 13f79535-47bb-0310-9956-ffa450edef68