Hotfix SchematicSelector

SpigotCore_Main/src/de/steamwar/inventory/SchematicSelector.java

@@ -409,7 +409,7 @@ public class SchematicSelector {
                 nodes.removeIf(node -> !node.isDir());
                 break;
             case SCHEMATIC_TYPE:
-                nodes.addAll(SchematicNode.accessibleByUserTypeMap(user, target.type).get(parent==null?null:parent.getId()));
+                nodes.addAll(SchematicNode.accessibleByUserTypeMap(user, target.type).get(parent==null?0:parent.getId()));
                 if(target.rank >= 0) {
                     nodes.removeIf(node -> {
                         if(node.isDir()) {