message: Fix crash if accessed resource is unbound
diff: @@ -3371,14 +3371,11 @@ RDTreeWidgetItem *ShaderViewer::makeAccessedResourceNode(const ShaderVariable &v
  }
  }
  - RDTreeWidgetItem *node = NULL;
  + RDTreeWidgetItem *node = new RDTreeWidgetItem({v.name, typeName, ToQStr(resId)});
  if(resId != ResourceId())
  - {
  - node = new RDTreeWidgetItem({v.name, typeName, ToQStr(resId)});
  node->setTag(QVariant::fromValue(AccessedResourceTag(bp, v.type)));
  if(modified)
  node->setForegroundColor(QColor(Qt::red));
  - }
  return node;
  }
  