[FIX] Active worker count method
[FIX] Active worker count method

* Mmodified Query to properly return total active workers

Fixes #740 once merged.

shreeneve/test,evgenyponomarev/pool,mculp/chunky-mpos,mmitech/php-mpos,BlueDragon747/php-mpos,UNOMP/chunky-mpos,studio666/php-mpos,ychaim/php-mpos,bankonme/php-mpos,sixxkilur/php-mpos,ychaim/php-mpos,MPOS/php-mpos,BlueDragon747/php-mpos,machinecoin-project/php-mpos,CoinHashMe/MPOS-SSO,xisi/php-mpos,evgenyponomarev/pool,UNOMP/chunky-mpos,sixxkilur/php-mpos,mculp/chunky-mpos,xisi/php-mpos,machinecoin-project/php-mpos,bankonme/php-mpos,shreeneve/test,mculp/chunky-mpos,ychaim/php-mpos,sasselin/xcoin-mpos,studio666/php-mpos,machinecoin-project/php-mpos,nimblecoin/web,sasselin/xcoin-mpos,mculp/chunky-mpos,CoinHashMe/MPOS-SSO,BlueDragon747/php-mpos,evgenyponomarev/pool,xisi/php-mpos,studio666/php-mpos,nimblecoin/web,MPOS/php-mpos,CoinHashMe/MPOS-SSO,UNOMP/chunky-mpos,mmitech/php-mpos,shreeneve/test,CoinHashMe/MPOS-SSO,MPOS/php-mpos,sasselin/xcoin-mpos,nimblecoin/web,bankonme/php-mpos,UNOMP/chunky-mpos,sixxkilur/php-mpos,CoinHashMe/MPOS-SSO,mmitech/php-mpos