fixed error calculating sscc

2018-06-26 09:16:50 +02:00 · 2018-06-26 09:16:50 +02:00 · ca494870f5
parent 62d391eadf
commit ca494870f5
1 changed files with 1 additions and 1 deletions
--- a/stock.py
+++ b/stock.py
@ -33,7 +33,7 @@ class UnitLoad:
        return ''

    def get_grai(self):
-        return None
+        return ''

    @staticmethod
    def _sscc_control_digit(num):