QmlDesigner: Don't call an empty abort callback

Change-Id: I753aaa1ad693bb9ea5b34f1b50af40e2ef616c30
Reviewed-by: Thomas Hartmann <thomas.hartmann@qt.io>

src/plugins/qmldesigner/designercore/imagecache/imagecachecollector.cpp

@@ -91,6 +91,7 @@ void ImageCacheCollector::start(Utils::SmallStringView name,
     model->setRewriterView(&rewriterView);
 
     if (rewriterView.inErrorState() || !rewriterView.rootModelNode().metaInfo().isGraphicalItem()) {
+        if (abortCallback)
             abortCallback(ImageCache::AbortReason::Failed);
         return;
     }
@@ -126,7 +127,7 @@ void ImageCacheCollector::start(Utils::SmallStringView name,
     model->setNodeInstanceView({});
     model->setRewriterView({});
 
-    if (!capturedDataArrived)
+    if (!capturedDataArrived && abortCallback)
         abortCallback(ImageCache::AbortReason::Failed);
 }
 

src/plugins/qmldesigner/designercore/instances/baseconnectionmanager.cpp

@@ -137,6 +137,7 @@ void BaseConnectionManager::callCrashCallback()
 {
     std::lock_guard<std::mutex> lock{m_callbackMutex};
 
+    if (m_crashCallback)
         m_crashCallback();
 }
 } // namespace QmlDesigner