Update nzbx_ws_hashdecrypt.php

Only poll provider site if we really have something to process.

NOTE: I suck at php, so this is not very "clean" but hope you get the idea.
Merge pull request #611 from kaibosh/patch-1

Update nzbx_ws_hashdecrypt.php
Merge pull request #612 from nZEDb/master

updating dev to master
Merge pull request #613 from nZEDb/dev

Merge pull request #612 from nZEDb/master