Fix PlayerLinksSendEvent not firing when no global links are configured (#14026)

Author: noctiro

paper-server/patches/sources/net/minecraft/server/network/ServerConfigurationPacketListenerImpl.java.patch

@@ -47,13 +47,14 @@
 +        new io.papermc.paper.event.connection.configuration.PlayerConnectionInitialConfigureEvent(this.paperConnection).callEvent(); // Paper
          this.send(new ClientboundCustomPayloadPacket(new BrandPayload(this.server.getServerModName())));
          ServerLinks serverLinks = this.server.serverLinks();
-         if (!serverLinks.isEmpty()) {
+-        if (!serverLinks.isEmpty()) {
 -            this.send(new ClientboundServerLinksPacket(serverLinks.untrust()));
-+            // Paper start
-+            org.bukkit.craftbukkit.CraftServerLinks links = new org.bukkit.craftbukkit.CraftServerLinks(serverLinks);
-+            new org.bukkit.event.player.PlayerLinksSendEvent(this.paperConnection, links).callEvent();
++        // Paper start
++        org.bukkit.craftbukkit.CraftServerLinks links = new org.bukkit.craftbukkit.CraftServerLinks(serverLinks);
++        new org.bukkit.event.player.PlayerLinksSendEvent(this.paperConnection, links).callEvent();
++        if (!links.getServerLinks().isEmpty()) {
 +            this.send(new ClientboundServerLinksPacket(links.getServerLinks().untrust()));
-+            // Paper end
++        // Paper end
          }
 
          LayeredRegistryAccess<RegistryLayer> registries = this.server.registries();