Use a separate cursor in loop to set translation

cursor_dict returns an iterator that consumes the cursor. This means the cursor
can not be used before the iteration is stopped. So we need to use another
cursor to make the update queries.

trytond/ir/translation.py

@@ -1465,6 +1465,7 @@ class TranslationUpdate(Wizard):
         pool = Pool()
         Translation = pool.get('ir.translation')
         cursor = Transaction().connection.cursor()
+        cursor_update = Transaction().connection.cursor()
         translation = Translation.__table__()
         lang = self.start.language.code
         columns = [translation.name.as_('name'),
@@ -1518,7 +1519,7 @@ class TranslationUpdate(Wizard):
                     where=(translation.lang == lang)
                     & translation.type.in_(self._updatable_types))))
         for row in cursor_dict(cursor):
-            cursor.execute(*translation.update(
+            cursor_update.execute(*translation.update(
                     [translation.fuzzy, translation.src],
                     [True, row['src']],
                     where=(translation.name == row['name'])
@@ -1541,14 +1542,14 @@ class TranslationUpdate(Wizard):
                 group_by=translation.src))
 
         for row in cursor_dict(cursor):
-            cursor.execute(*translation.update(
+            cursor_update.execute(*translation.update(
                     [translation.fuzzy, translation.value],
                     [True, row['value']],
                     where=(translation.src == row['src'])
                     & ((translation.value == '') | (translation.value == Null))
                     & (translation.lang == lang)))
 
-        cursor.execute(*translation.update(
+        cursor_update.execute(*translation.update(
                 [translation.fuzzy],
                 [False],
                 where=((translation.value == '') | (translation.value == Null))