Addendum to fix of bug #22344 : removed dead code.

sql/item.cc

@@ -5277,18 +5277,7 @@ my_decimal *Item_ref::val_decimal(my_decimal *decimal_value)
 int Item_ref::save_in_field(Field *to, bool no_conversions)
 {
   int res;
-  if (result_field)
-  {
-    if (result_field->is_null())
-    {
-      null_value= 1;
-      return set_field_to_null_with_conversions(to, no_conversions);
-    }
-    to->set_notnull();
-    res= field_conv(to, result_field);
-    null_value= 0;
-    return res;
-  }
+  DBUG_ASSERT(!result_field);
   res= (*ref)->save_in_field(to, no_conversions);
   null_value= (*ref)->null_value;
   return res;