64-bit time_t compatibility

src/http/ngx_http_request_body.c

diff --git a/src/http/ngx_http_request_body.c b/src/http/ngx_http_request_body.c
index a9583c7..a5b6813 100644
--- a/src/http/ngx_http_request_body.c
+++ b/src/http/ngx_http_request_body.c
@@ -493,7 +493,7 @@
     }
 
     if (r->lingering_time) {
-        timer = r->lingering_time - ngx_time();
+        timer = (ngx_msec_t) (r->lingering_time - ngx_time());
 
         if (timer <= 0) {
             r->discard_body = 0;