usp10: Get rid of the code duplication between GSUB_initialize_feature_cache() and GPOS_expand_feature_cache().
Signed-off-by: Henri Verbeet <hverbeet@codeweavers.com>
Signed-off-by: Aric Stewart <aric@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>