Fixed bug with inserting songs

pkg/db/song.go

@@ -37,7 +37,13 @@ func CheckSong(path string) bool {
 	if err != nil {
 		_, _ = fmt.Fprintf(os.Stderr, "Exec failed: %v\n", err)
 	}
-	return query.Next()
+	var result string
+	err = query.Scan(&result)
+	if err != nil {
+		_, _ = fmt.Fprintf(os.Stderr, "QueryRow failed: %v\n", err)
+		return false
+	}
+	return result != ""
 }
 
 func UpdateSong(songName string, fileName string, path string) {