Added no SID robustness

Samo Penic

2018-11-17 cf921b251d8664900bc7c5b3068bcd7b0ce2b2b7

 Ocr.py

@@ -237,6 +237,15 @@


    def get_code_data(self):
        if self.QRData is None:
            self.errors.append("Could not read QR or EAN code! Not an exam?")
            retval = {'exam_id': None,
                      'page_no': None,
                      'paper_id': None,
                      'faculty_id': None,
                      'sid':None
                      }
            return retval
        qrdata = bytes.decode(self.QRData, 'utf8')
        if self.QRDecode[0].type=='EAN13':
            return {'exam_id': int(qrdata[0:7]),