Add check for destroyed gameobjects

Editor/Tools/Socket_Editor.cs

@@ -84,7 +84,7 @@ namespace Passer.Humanoid {
             GameObject obj = Instantiate(prefab, socket.transform.position, socket.transform.rotation);
             obj.name = prefab.name; // Remove the (Clone)
 
-            socket.Attach(obj.transform);
+            socket.Attach(obj.transform, false);
             if (socket.attachedTransform == null)
                 Debug.LogWarning("Could not attach transform");
             else {

Runtime/HumanoidControl/Scripts/Interaction/HandInteraction.cs

@@ -327,6 +327,9 @@ namespace Passer.Humanoid {
             bool grabHandle = false;
             bool grabHandleInSocket = false;
             foreach (Collider collider in colliders) {
+                if (collider == null)
+                    continue;
+                    
                 GameObject obj;
                 Rigidbody objRigidbody = collider.attachedRigidbody;
                 if (objRigidbody != null)