fix request counter handling while discarding body, introduced in r3050

src/http/ngx_http_request_body.c

@@ -477,6 +477,7 @@ ngx_http_discard_request_body(ngx_http_request_t *r)
         return NGX_HTTP_INTERNAL_SERVER_ERROR;
     }
 
+    r->count++;
     (void) ngx_http_read_discarded_request_body(r);
 
     return NGX_OK;