Only Use Roundstart Species for RandomHumanoid (#1624)

it will no longer choose vox or lamia.

Content.Server/Humanoid/Systems/RandomHumanoidSystem.cs

@@ -1,3 +1,4 @@
+using System.Linq;
 using Content.Server.Humanoid.Components;
 using Content.Server.RandomMetadata;
 using Content.Shared.Humanoid.Prototypes;
@@ -19,6 +20,8 @@ public sealed class RandomHumanoidSystem : EntitySystem
 
     [Dependency] private readonly HumanoidAppearanceSystem _humanoid = default!;
 
+    private HashSet<string> _notRoundStartSpecies = new();
+
     /// <inheritdoc/>
     public override void Initialize()
     {
@@ -31,14 +34,26 @@ private void OnMapInit(EntityUid uid, RandomHumanoidSpawnerComponent component,
         QueueDel(uid);
         if (component.SettingsPrototypeId != null)
             SpawnRandomHumanoid(component.SettingsPrototypeId, Transform(uid).Coordinates, MetaData(uid).EntityName);
+
+        var speciesList = _prototypeManager.EnumeratePrototypes<SpeciesPrototype>()
+            .Where(x => !x.RoundStart)
+            .Select(x => x.Prototype.Id)
+            .ToHashSet();
+
+        _notRoundStartSpecies = speciesList;
     }
 
     public EntityUid SpawnRandomHumanoid(string prototypeId, EntityCoordinates coordinates, string name)
     {
         if (!_prototypeManager.TryIndex<RandomHumanoidSettingsPrototype>(prototypeId, out var prototype))
             throw new ArgumentException("Could not get random humanoid settings");
 
-        var profile = HumanoidCharacterProfile.Random(prototype.SpeciesBlacklist);
+        var blacklist = prototype.SpeciesBlacklist;
+
+        if (!prototype.SpeciesBlacklist.Any())
+            blacklist = _notRoundStartSpecies;
+
+        var profile = HumanoidCharacterProfile.Random(blacklist);
         var speciesProto = _prototypeManager.Index<SpeciesPrototype>(profile.Species);
         var humanoid = EntityManager.CreateEntityUninitialized(speciesProto.Prototype, coordinates);