fix npctrade buy with bps and ignorecapacity
fix npctrade buy with bps and ignorecapacity

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