Small Bugfix

This is a small bugfix that fixes an issue with the Summoner boss, on wave 45.  The issue was that the player could sometimes not get all of the deserved gold if they killed the Summoner too quickly.  This was caused by the Summoner stopping it's summon animation early if it reached zero health, as well as already-summoned spirits vanishing without awarding gold.  Now with this update, the player is always awarded the total value of all spirits, regardless of whether or not they were killed directly, or even not summoned at all.

Special thanks to elsecaller for pointing out this very subtle bug!