Initialize to 0

src/covermanager/albumcoverfetcher.h

@@ -46,7 +46,7 @@ class AlbumCoverFetcherSearch;
 
 // This class represents a single search-for-cover request. It identifies and describes the request.
 struct CoverSearchRequest {
-  explicit CoverSearchRequest() : id(-1), search(false), batch(false) {}
+  explicit CoverSearchRequest() : id(0), search(false), batch(false) {}
 
   // An unique (for one AlbumCoverFetcher) request identifier
   quint64 id;

src/lyrics/lyricsfetcher.h

@@ -37,7 +37,7 @@ class LyricsProviders;
 class LyricsFetcherSearch;
 
 struct LyricsSearchRequest {
-  explicit LyricsSearchRequest() : id(-1) {}
+  explicit LyricsSearchRequest() : id(0) {}
   quint64 id;
   QString artist;
   QString album;