MariaRocks port: Fix for the previous cset (MariaRocks port: put back the assert)

- Put back the assert on SQL layer at the right location
- Adjust rdb_pack_with_make_sort_key to work around the assert (like
  it is done at other palaces):  MyRocks may need to pack a column
  value even when the column is not in the read set.

sql/field.cc

@@ -8721,13 +8721,13 @@ int Field_enum::store(longlong nr, bool unsigned_val)
 
 double Field_enum::val_real(void)
 {
-  ASSERT_COLUMN_MARKED_FOR_READ;
   return (double) Field_enum::val_int();
 }
 
 
 longlong Field_enum::val_int(void)
 {
+  ASSERT_COLUMN_MARKED_FOR_READ;
   return read_lowendian(ptr, packlength);
 }
 

storage/rocksdb/rdb_datadic.cc

@@ -749,7 +749,12 @@ void rdb_pack_with_make_sort_key(Rdb_field_packing* const fpi,
   DBUG_ASSERT(*dst != nullptr);
 
   const int max_len= fpi->m_max_image_len;
+  my_bitmap_map *old_map;
+
+  old_map= dbug_tmp_use_all_columns(field->table,
+                                    field->table->read_set);
   field->sort_string(*dst, max_len);
+  dbug_tmp_restore_column_map(field->table->read_set, old_map);
   *dst += max_len;
 }