Handle sanitized protections edge case

CHANGELIST.md

@@ -21,6 +21,7 @@
 - Update to Aaru v5.3.1 LTS
 - Add upper case `<TAB>` processing
 - Reorder event handers
+- Handle sanitized protections edge case
 
 ### 2.3 (2022-02-05)
 - Start overhauling Redump information pulling, again

MPF.Library/Protection.cs

@@ -48,6 +48,9 @@ namespace MPF.Library
 
                 // Sanitize and join protections for writing
                 string protections = SanitizeFoundProtections(orderedDistinctProtections);
+                if (string.IsNullOrWhiteSpace(protections))
+                    return (true, "None found");
+
                 return (true, protections);
             }
             catch (Exception ex)