Update ngx_http_vhost_traffic_status_module.c

[itpp16]

Works good! just a few patches to fix C4244: conversion from 'off_t' to 'ngx_atomic_t' warnings.

[vozlt]

Thanks for the patch.
It will be fixed just as follows:

(ngx_int_t) to (ngx_atomic_t)

[vozlt]

I have only just considered my system. :)
Please tell me your system(name and version and compiler) and nginx version.

[vozlt]

cba50bd