Win32: fixed init_process without master process (ticket #453).
Win32: fixed init_process without master process (ticket #453).

Init process callbacks are called by ngx_worker_thread(), there is no
need to call them in ngx_single_process_cycle().

firebase/nginx,hy0kl/nginx,firebase/nginx,hy0kl/nginx,firebase/nginx,hy0kl/nginx,firebase/nginx