27908 ::gcore breaks sparc build

*** 174,187 ****
  {
          char fname[PATH_MAX];
          struct stat statb;
  
          if (P->state == PS_DEAD) {
!                 lwp_info_t *lwp = list_next(&P->core->core_lwp_head);
                  uint_t i;
  
!                 for (i = 0; i < P->core->core_nlwp; i++, lwp = list_next(lwp)) {
                          if (lwp->lwp_id == lwpid) {
                                  if (lwp->lwp_xregs != NULL)
                                          *xrsize = sizeof (prxregset_t);
                                  else
                                          *xrsize = 0;
--- 174,188 ----
  {
          char fname[PATH_MAX];
          struct stat statb;
  
          if (P->state == PS_DEAD) {
!                 core_info_t *core = P->data;
!                 lwp_info_t *lwp = list_next(&core->core_lwp_head);
                  uint_t i;
  
!                 for (i = 0; i < core->core_nlwp; i++, lwp = list_next(lwp)) {
                          if (lwp->lwp_id == lwpid) {
                                  if (lwp->lwp_xregs != NULL)
                                          *xrsize = sizeof (prxregset_t);
                                  else
                                          *xrsize = 0;