[PD] variable signal outlets and inlets?

[Miller Puckette]

Pd generates a signal filled with zeros for unconnected inlets.

cheers
Miller

> 
> One question that now arises is why doesn't the perform routine crash if one
> of its signal inlets/outlets isn't connected? The perform routine always
> accesses memory behind the signal pointers even if they aren't connected, so
> there must be something there. Is there some kind of default 'empty' signal
> that goes into/out of empty slots? I'm just curious.
>