NEX-2985 libtopo leaks
Reviewed by: Marcel Telka <marcel.telka@nexenta.com>
Reviewed by: Josef Sipek <josef.sipek@nexenta.com>

*** 219,229 ****
  char *
  pci_slot_label_lookup(topo_mod_t *mod, tnode_t *node, did_t *dp, did_t *pdp)
  {
          tnode_t *anode, *apnode;
          did_t *adp, *apdp;
!         char *plat, *pp, *l, *ancestor_l = NULL, *new_l = NULL;
          int err, b, d, f, done = 0;
          size_t len;
  
          did_BDF(dp, &b, &d, &f);
  
--- 219,229 ----
  char *
  pci_slot_label_lookup(topo_mod_t *mod, tnode_t *node, did_t *dp, did_t *pdp)
  {
          tnode_t *anode, *apnode;
          did_t *adp, *apdp;
!         char *plat, *pp, *l = NULL, *ancestor_l = NULL, *new_l = NULL;
          int err, b, d, f, done = 0;
          size_t len;
  
          did_BDF(dp, &b, &d, &f);
  
*** 395,404 ****
--- 395,407 ----
                                      pci_label_missing_lookup(mod, pp, dp);
                          }
                  }
                  topo_mod_strfree(mod, plat);
          }
+         if (ancestor_l != NULL) {
+                 topo_mod_strfree(mod, ancestor_l);
+         }
  
          /*
           * If we calculated a slot label,  then save it in the
           * node's data structure so we can free it later.
           */