tree 2f7827d4d7f606b41adbc1540845c6695c10ca67
parent a5f0cdb36f9dd06866e62c7094939ccd62db7caa
author Masanori Kakura <kakurasan@gmail.com> 1482931262 +0900
committer Axel Davy <axel.davy@ens.fr> 1484249591 +0100

st/nine: Don't call u_box_union_* when dirty region is empty

When dirty region is empty, u_box_union_* incorrectly expands
the new region.

This fixes broken font rendering issue in WOLF RPG Editor v2.10 games.

Signed-off-by: Masanori Kakura <kakurasan@gmail.com>
Reviewed-by: Axel Davy <axel.davy@ens.fr>