qsort_r funny in lib/packet.c

[alanz]

On linux the last two parameters of qsort_r seem to be swapped.

I need to replace

qsort_r(p->js,keys,sizeof(unsigned short)*4,p->json,pkeycmp);

with

qsort_r(p->js,keys,sizeof(unsigned short)*4,pkeycmp,p->json);

otherwise it segfaults.

What is the best way of resolving this?