Try to fix build error

Not sure if this is the correct fix, because I can't reproduce the error.

source/blender/simulation/intern/particle_mesh_emitter.cc

@@ -28,6 +28,8 @@
 
 namespace blender::sim {
 
+ParticleMeshEmitter::~ParticleMeshEmitter() = default;
+
 struct EmitterSettings {
   Object *object;
   float rate;

source/blender/simulation/intern/particle_mesh_emitter.hh

@@ -39,6 +39,8 @@ class ParticleMeshEmitter final : public ParticleEmitter {
   {
   }
 
+  ~ParticleMeshEmitter();
+
   void emit(ParticleEmitterContext &context) const override;
 };