Prevent crash when trying to preload non-existing slide

Change-Id: I342d6a8b5ee85d3836eef1fece0dd87b5efed215
Reviewed-by: Kaj Grönholm <kaj.gronholm@qt.io>
Reviewed-by: Tomi Korpipää <tomi.korpipaa@qt.io>

1 files changed, 4 insertions, 0 deletions

diff --git a/src/runtime/Qt3DSApplication.cpp b/src/runtime/Qt3DSApplication.cpp
index 6d88400..cec15d4 100644
--- a/src/runtime/Qt3DSApplication.cpp
+++ b/src/runtime/Qt3DSApplication.cpp
@@ -1688,6 +1688,10 @@ struct SApp : public IApplication
         }
         ISlideSystem &s = presentation->GetSlideSystem();
         index = s.FindSlide(*component, qPrintable(slideName));
+        if (index == 0xFF) {
+            qCWarning(WARNING) << "Could not find slide: " << elementPath;
+            return false;
+        }
         return true;
     }