[FIX] Return proper data if memcache disabled
[FIX] Return proper data if memcache disabled

If memcache option is disabled, the functions should return the data we
tried to set instead of false. At least we can ensure data is returned
as expected from any methods trying to use the memcache.

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