More const detach fixes

src/moodbar/moodbarbuilder.cpp

@@ -177,10 +177,11 @@ QByteArray MoodbarBuilder::Finish(int width) {
     const int end = std::max(static_cast<int>((i + 1) * frames_.count() / width), start + 1);
 
     for (int j = start; j < end; j++) {
-      const Rgb &frame = frames_[j];
+      const Rgb frame = frames_.value(j);
       rgb.r += frame.r * 255;
       rgb.g += frame.g * 255;
       rgb.b += frame.b * 255;
+      frames_[j] = rgb;
     }
 
     const int n = end - start;

src/moodbar/moodbarloader.cpp

@@ -107,7 +107,7 @@ MoodbarLoader::Result MoodbarLoader::Load(const QUrl &url, const bool has_cue, Q
 
   // Are we in the middle of loading this moodbar already?
   if (requests_.contains(url)) {
-    *async_pipeline = requests_[url];
+    *async_pipeline = requests_.value(url);
     return Result::WillLoadAsync;
   }
 
@@ -173,7 +173,7 @@ void MoodbarLoader::MaybeTakeNextRequest() {
   active_requests_ << url;
 
   qLog(Info) << "Creating moodbar data for" << url.toLocalFile();
-  QMetaObject::invokeMethod(requests_[url], &MoodbarPipeline::Start, Qt::QueuedConnection);
+  QMetaObject::invokeMethod(requests_.value(url), &MoodbarPipeline::Start, Qt::QueuedConnection);
 
 }