use 'T2' to find source and then find mis-matching qh_settemp
design:
check top of qh->qhmem.tempstack
free it
*/
voidqh_settempfree(qhT*qh,setT**set){
setT*stackedset;
if(!*set)
return;
stackedset=qh_settemppop(qh);
if(stackedset!=*set){
qh_settemppush(qh,stackedset);
qh_fprintf(qh,qh->qhmem.ferr,6179,"qhull internal error (qh_settempfree): set %p(size %d) was not last temporary allocated(depth %d, set %p, size %d)\n",