Fix segfault on exit cause by creatures not being cleared.
Fix segfault on exit cause by creatures not being cleared.

kwketh/otclient,gpedro/otclient,gpedro/otclient,EvilHero90/otclient,Cavitt/otclient_mapgen,dreamsxin/otclient,gpedro/otclient,dreamsxin/otclient,Radseq/otclient,kwketh/otclient,EvilHero90/otclient,Cavitt/otclient_mapgen,dreamsxin/otclient,Radseq/otclient