Cast integer ap_wait_t values in http_main.c to get rid of compile time

errors on platforms where "ap_wait_t" is not defined as "int" (currently
only the NEXT and UTS21 platforms). If you've a better non-evil-cast
solution, feel free to adjust this again.

Submitted by: Gary Bickford <garyb@fxt.com>, Ralf S. Engelschall
Reviewed by: Ralf S. Engelschall
PR: 5053


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/1.3.x@84580 13f79535-47bb-0310-9956-ffa450edef68