[MOD] tariff import wizard

Added control to avoid importing empty lines

wizard/tariff_import_wizard.py

@@ -203,8 +203,9 @@ class WizardImportTariff(models.TransientModel):
         values = []
         fr = self.file_reader[row_number]
         if fr:
-            values.extend([fr[0],fr[3]])
-            return values
+            if fr[0] != '' and fr[3] != '':
+                values.extend([fr[0],fr[3]])
+                return values
         return False
 
     def get_records(self):