6659 nvlist_free(NULL) is a no-op

@@ -523,11 +523,10 @@
                     FM_FMRI_MEM_PHYSADDR, err1 == 0 ? (u_longlong_t)val1 :
                     (u_longlong_t)val2, rc, errno);
                 retval = 1;
         }
 
-        if (nvlcp)
                 nvlist_free(nvlcp);
 
         return (retval);
 }