new readerController load API for readerControllerAsyncTest

lib/src/test/readerControllerAsyncTest.cpp

@@ -113,7 +113,7 @@ void testAsyncLoading() {
   ENSURE(preloadedFrames >= numReaders, "Controller init should start pre-loading at least one frame per reader");
 
   std::map<readerid_t, Input::PotentialFrame> frames;
-  std::list<Audio::audioBlockGroupMap_t> audio;
+  Audio::audioBlocks_t audio;
   Input::MetadataChunk metadata;
   mtime_t date;