FIX: include of cstddef header was missing for ptrdiff_t useage.  see: http://www.cegui.org.uk/phpBB2/viewtopic.php?f=3&t=5546
FIX: include of cstddef header was missing for ptrdiff_t useage.  see: http://www.cegui.org.uk/phpBB2/viewtopic.php?f=3&t=5546

cbeck88/cegui-mirror,cbeck88/cegui-mirror,arkana-fts/cegui,RealityFactory/CEGUI,arkana-fts/cegui,arkana-fts/cegui,arkana-fts/cegui,RealityFactory/CEGUI,RealityFactory/CEGUI,arkana-fts/cegui,RealityFactory/CEGUI,cbeck88/cegui-mirror,RealityFactory/CEGUI,cbeck88/cegui-mirror,cbeck88/cegui-mirror