Fix for bug #6753: metaballs instanced by a particle system did not

refresh properly, also fixed a memory leak.

source/blender/blenkernel/intern/depsgraph.c

@@ -610,6 +610,8 @@ static void build_dag_object(DagForest *dag, DagNode *scenenode, Object *ob, int
 			if(part->draw_as == PART_DRAW_OB && part->dup_ob) {
 				node2 = dag_get_node(dag, part->dup_ob);
 				dag_add_relation(dag, node, node2, DAG_RL_OB_OB);
+				if(part->dup_ob->type == OB_MBALL)
+					dag_add_relation(dag, node, node2, DAG_RL_DATA_DATA);
 			}
 
 			if(part->draw_as == PART_DRAW_GR && part->dup_group) {

source/blender/blenkernel/intern/scene.c

@@ -426,6 +426,9 @@ int next_object(int val, Base **base, Object **ob)
 							duplilist= object_duplilist(G.scene, (*base)->object);
 							
 							dupob= duplilist->first;
+
+							if(!dupob)
+								free_object_duplilist(duplilist);
 						}
 					}
 				}