Actually call databasesCron() inside serverCron().

src/redis.c

@@ -932,6 +932,9 @@ int serverCron(struct aeEventLoop *eventLoop, long long id, void *clientData) {
     /* We need to do a few operations on clients asynchronously. */
     clientsCron();
 
+    /* Handle background operations on Redis databases. */
+    databasesCron();
+
     /* Start a scheduled AOF rewrite if this was requested by the user while
      * a BGSAVE was in progress. */
     if (server.rdb_child_pid == -1 && server.aof_child_pid == -1 &&