Merge pull request #6386 from ronjouch/fix-rating-not-written-to-file

Fix ratings not saved to file tag (Fix #6385)

ext/libclementine-tagreader/tagreader.cpp

@@ -981,7 +981,7 @@ bool TagReader::SaveSongRatingToFile(
   if (filename.isNull()) return false;
 
   qLog(Debug) << "Saving song rating tags to" << filename;
-  if (song.rating()) {
+  if (song.rating() < 0) {
     // The FMPS spec says unrated == "tag not present". For us, no rating
     // results in rating being -1, so don't write anything in that case.
     // Actually, we should also remove tag set in this case, but in