Fix error in time parsing

nilmdb/utils/time.py

@@ -70,7 +70,7 @@ def parse_time(toparse):
     try:
         if toparse[0] == '@':
             return int(toparse[1:])
-    except (ValueError, KeyError):
+    except (ValueError, KeyError, IndexError):
         pass
 
     # If string isn't "now" and doesn't contain at least 4 digits,