fix(#162): Missing $this-> on class calls
fix(#162): Missing $this-> on class calls

Thanks @normk2k!

Signed-off-by: Francisco Miguel Biete <f1d806242fc0bb697f053bcdfc66a36bc885611e@gmail.com>
<fbiete@gmail.com>

Freeaqingme/Z-Push-contrib,fmbiete/Z-Push-contrib,mta59066/Z-Push-contrib,RavenB/Z-Push-contrib