Fix blackjack script by logging out to prevent zeny deletion

there is a well known bug of this script (I've known this since eathena actually)
when you are certainly going to lose the bet, log out immediately while the card are still dealt
and you don't get zeny deletion

thx to Holiness to bring this up again
Fixed bug 8365

*unittalk script command will send the message twice to the invoking character
hercules.ws/board/tracker/issue-8365-bug-unittalk-twice-message/
Merge branch 'master' of https://github.com/HerculesWS/Hercules