round up backup age

tests/test_backup.py

@@ -78,7 +78,7 @@ def check_local_backup(path):
         now = datetime.now()
         diff_seconds = (now - d).total_seconds()
         if diff_seconds > 48*3600:
-            print('Backup %s is older than 48h (%sh)' % (backup_folder, diff_seconds/3600))
+            print('Backup %s is older than 48h (%ih)' % (backup_folder, diff_seconds/3600))
             all_ok = False 
         else:
             print('Backup %s is fine' % backup_folder)