Storing external data in PMCs

[Arthur Bergman]

Hi,

So I am currently trying to do a Perl5LVALUE pmc, a stumbling block is 
however that I need to pass the PMC the thing that it is lvalueling, I 
was planning to use the pmc data field for storing this but I cannot 
access it as a extender without violating the API and guessing at 
layouts which is kind of bad (Dan says so ;)

Arthur