Fix crash in updateSizes

Add nullptr check to light gatherer since the attached might not have been
created yet.

Task-number: QT3DS-3127
Change-Id: Ideaad988ac03b829c8876def1ee3076c560034b9
Reviewed-by: Miikka Heikkinen <miikka.heikkinen@qt.io>

1 files changed, 1 insertions, 1 deletions

diff --git a/src/runtime/q3dsscenemanager.cpp b/src/runtime/q3dsscenemanager.cpp
index 856fc8f..60cf6ec 100644
--- a/src/runtime/q3dsscenemanager.cpp
+++ b/src/runtime/q3dsscenemanager.cpp
@@ -575,7 +575,7 @@ void Q3DSSceneManager::updateSizes(const QSize &size, qreal dpr, const QRect &vi
         } else if (obj->type() == Q3DSGraphObject::Light) {
             // Force gathering of lights if there is a pending light visibility change
             auto data = obj->attached<Q3DSNodeAttached>();
-            if (data->frameChangeFlags & Q3DSNode::EyeballChanges && data->layer3DS) {
+            if (data && (data->frameChangeFlags & Q3DSNode::EyeballChanges) && data->layer3DS) {
                 auto layerData = data->layer3DS->attached<Q3DSLayerAttached>();
                 layerData->frameChangeFlags |= Q3DSLayerNode::LayerContentSubTreeLightsChange;
             }