unable to expand linked lists

[GitMensch]

Similar issue as #229, here with a linked list.

The variable was shown as "h Object@address", the child was shown as "next Object@address" (so the dereferencing did work. When checking the output the extension asked for *h to get to the first child - which is the correct thing to do; but when asking for h->next child's the extension asked for **h->next.

I guess that's an easy fix - but I actually have no idea where to patch this (and still can't debug the debug extension, doing so only runs it but does not do any debugging).