AUDIO UI: Warn separately when the default audio stream is not found

src/UI/VivyDocumentView.cc

@@ -54,8 +54,14 @@ VivyDocumentView::loadAudioView() noexcept
         qDebug() << "Create an audio vizualizer for the audio sub document"
                  << audioDocument->getFilePath();
 
-        if (AudioContext::StreamPtr stream = audioDocument->getDefaultStream();
-            (stream == nullptr) || (visualizer = new AudioVisualizer(stream)) == nullptr) {
+        AudioContext::StreamPtr stream = audioDocument->getDefaultStream();
+        if (stream == nullptr) {
+            qCritical() << "Failed to get default audio stream";
+            return;
+        }
+
+        visualizer = new AudioVisualizer(stream);
+        if (visualizer == nullptr) {
             qCritical() << "Failed to create visualizer for" << audioDocument->getFilePath();
             return;
         }