patch tsoome-feedback
6659 nvlist_free(NULL) is a no-op

*** 1699,1709 ****
                          matched++;
                          out(O_ALTFP|O_NONL, "[");
                          ipath_print(O_ALTFP|O_NONL, eventstring, ipp);
                          out(O_ALTFP, " explained by FME%d]", fmep->id);
  
-                         if (pre_peek_nvp)
                                  nvlist_free(pre_peek_nvp);
  
                          if (ep->count == 1)
                                  serialize_observation(fmep, eventstring, ipp);
  
--- 1699,1708 ----
*** 2026,2044 ****
          }
  
          err = nvlist_add_nvlist_array(f, FM_FMRI_HC_LIST, pa, depth);
          if (err == 0) {
                  for (i = 0; i < depth; i++)
-                         if (pa[i] != NULL)
                                  nvlist_free(pa[i]);
                  return (f);
          }
          failure = "addition of hc-pair array to FMRI failed";
  
  boom:
          for (i = 0; i < depth; i++)
-                 if (pa[i] != NULL)
                          nvlist_free(pa[i]);
          nvlist_free(f);
          out(O_DIE, "%s", failure);
          /*NOTREACHED*/
          return (NULL);
--- 2025,2041 ----
*** 2099,2117 ****
          }
  
          err = nvlist_add_nvlist_array(f, FM_FMRI_HC_LIST, pa, depth);
          if (err == 0) {
                  for (i = 0; i < depth; i++)
-                         if (pa[i] != NULL)
                                  nvlist_free(pa[i]);
                  return (f);
          }
          failure = "addition of hc-pair array to FMRI failed";
  
  boom:
          for (i = 0; i < depth; i++)
-                 if (pa[i] != NULL)
                          nvlist_free(pa[i]);
          nvlist_free(f);
          out(O_DIE, "%s", failure);
          /*NOTREACHED*/
          return (NULL);
--- 2096,2112 ----
*** 2139,2153 ****
   *      freed elsewhere.
   */
  static void
  rslfree(struct rsl *freeme)
  {
-         if (freeme->asru != NULL)
                  nvlist_free(freeme->asru);
-         if (freeme->fru != NULL)
                  nvlist_free(freeme->fru);
!         if (freeme->rsrc != NULL && freeme->rsrc != freeme->asru)
                  nvlist_free(freeme->rsrc);
  }
  
  /*
   *  rslcmp -- compare two rsl structures.  Use the following
--- 2134,2146 ----
   *      freed elsewhere.
   */
  static void
  rslfree(struct rsl *freeme)
  {
          nvlist_free(freeme->asru);
          nvlist_free(freeme->fru);
!         if (freeme->rsrc != freeme->asru)
                  nvlist_free(freeme->rsrc);
  }
  
  /*
   *  rslcmp -- compare two rsl structures.  Use the following