PR https://github.com/VOREStation/VOREStation/pull/11454 set var amount on stacks to private, necessitating using get_amount() to read the amount currently left in a stack, rather than just directly accessing the var.
tgui_act requires the parent to be called, this is accomplished via an if(..()) return TRUE traditionally.
listeningpost.dm wasn't parsed correctly/fixed by pullbot in https://github.com/CHOMPStation2/CHOMPStation2/pull/1777, so this updates that to fix it to prevent compiler errors.
