Iterate by const reference on handles

When iterating on handles, use const references to avoid copy of non
trivial type. Found by Clazy clazy-range-loop

Change-Id: I33ec54b3958160da2517e196411bcf92cd7b3bff
Reviewed-by: Sean Harmer <sean.harmer@kdab.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/src/render/jobs/lightgatherer.cpp b/src/render/jobs/lightgatherer.cpp
index e62544f15..b76cd4d73 100644
--- a/src/render/jobs/lightgatherer.cpp
+++ b/src/render/jobs/lightgatherer.cpp
@@ -61,7 +61,7 @@ void LightGatherer::run()
     const QVector<HEntity> handles = m_manager->activeHandles();
     int envLightCount = 0;
 
-    for (const HEntity handle : handles) {
+    for (const HEntity &handle : handles) {
         Entity *node = m_manager->data(handle);
         const QVector<Light *> lights = node->renderComponents<Light>();
         if (!lights.isEmpty())