bugfix: NPE in SelectedRagdoll

Author: stephengold

LICENSE

@@ -1,5 +1,5 @@
 The com.jme3 software packages are Copyright (c) 2009-2019 jMonkeyEngine
-The maud software packages are Copyright (c) 2017-2024 Stephen Gold
+The maud software packages are Copyright (c) 2017-2025 Stephen Gold
 
 All rights reserved.
 

src/main/java/maud/model/cgm/SelectedRagdoll.java

@@ -1,5 +1,5 @@
 /*
- Copyright (c) 2018-2023, Stephen Gold
+ Copyright (c) 2018-2025 Stephen Gold
  All rights reserved.
 
  Redistribution and use in source and binary forms, with or without
@@ -298,7 +298,7 @@ void setCgm(Cgm newCgm) {
     Spatial setSpatial(Spatial newSpatial) {
         CgmPhysics physics = cgm.getPhysics();
         DynamicAnimControl dac = find();
-        Spatial oldSpatial = dac.getSpatial();
+        Spatial oldSpatial = (dac == null) ? null : dac.getSpatial();
         if (oldSpatial != null) {
             physics.removePhysicsControl(dac);