Revert "Merge branch 'song1' of git://github.com/songbaisen/ceph into…

… wip-sage-testing"

This reverts commit 7aa0ea9, reversing
changes made to f6d2eeb.

src/crush/builder.c

@@ -91,8 +91,7 @@ int crush_add_rule(struct crush_map *map, struct crush_rule *rule, int ruleno)
 		memset(map->rules + oldsize, 0, (map->max_rules-oldsize) * sizeof(map->rules[0]));
 	}
 
-	/* add it */ 
-        assert(map->rules[r]);
+	/* add it */
 	map->rules[r] = rule;
 	return r;
 }