Fix segv introduced by 2fd069b18e

n->path is pointing to the value now, we set s = NULL above.

src/libsystemd-bus/bus-objects.c

@@ -1379,7 +1379,7 @@ static struct node *bus_node_allocate(sd_bus *bus, const char *path) {
         n->path = s;
         s = NULL; /* do not free */
 
-        r = hashmap_put(bus->nodes, s, n);
+        r = hashmap_put(bus->nodes, n->path, n);
         if (r < 0) {
                 free(n->path);
                 free(n);