PT_NULL
PTN_BRANCH_ODDMAN_SLOT(mask) = PT_NULL;
uintptr_t mask_node = PT_NULL;
next_node = PT_NULL;
next_node = PT_NULL;
mask_node = PT_NULL;
PTN_BRANCH_ROOT_SLOT(&pt->pt_rootnode) = PT_NULL;
PTN_BRANCH_ODDMAN_SLOT(&pt->pt_rootnode) = PT_NULL;
#define PT_NULL_P(node) ((node) == PT_NULL)
if (ph[i].p_type == PT_NULL || ph[i].p_type == PT_NOTE ||
case PT_NULL: