Fix alpha at color key.
Fix alpha at color key.

gpedro/otclient,dreamsxin/otclient,gpedro/otclient,dreamsxin/otclient,Cavitt/otclient_mapgen,Radseq/otclient,Radseq/otclient,dreamsxin/otclient,Cavitt/otclient_mapgen,gpedro/otclient