Removed 0 as a rating, since it means unrated.

src/backend/model/fileaccess/MetadataLoader.ts

@@ -515,7 +515,7 @@ export class MetadataLoader {
     if (exif.xmp &&
       exif.xmp.Rating !== undefined) {
       const rting = Math.round(exif.xmp.Rating);
-      if (rting < 0) {
+      if (rting <= 0) {
         //We map all ratings below 0 to 0. Lightroom supports value -1, but most other tools (including this) don't.
         //Rating 0 means "unrated" according to adobe's spec, so we delete the attribute in pigallery for the same effect
         delete metadata.rating;

test/backend/assets/sidecar/metadata.json

@@ -3,7 +3,6 @@
     "width": 10,
     "height": 5
   },
-  "rating": 0,
   "creationDate": 1710188754000,
   "fileSize": 5095,
   "keywords": [

test/backend/assets/sidecar/metadata_v2.json

@@ -5,7 +5,6 @@
   },
   "creationDate": 1710188754000,
   "fileSize": 5095,
-  "rating": 0,
   "keywords": [
     "floor",
     "book",