Slain hero quest can freze the game

[AJenbo]

Describe
If a low level hero operates the Slain Hero the game will get stuck trying to generate the drop item. Basically the function will keep spawning random items until on of the given type is randomly created, for low level heros the given item would never spawn and so the game locks up in an infinite loop.

To Reproduce
Steps to reproduce the behavior:

1. Find (or spawn) the Slain Hero with a level 1
2. Click on the slain hero
3. Note that the game has now locked up

Expected behavior
The Slain Hero should always drop the expected item

[ThomasChr]

Tried with Warrior and Roque. Can't reproduce. Character level was 1.

[MegaMak84]

Managed to recreate this with a Lv. 20 Rogue, on Hellfire. Save attached.

single_2.zip

[StephenCWills]

I'm fairly certain this is a regression (bb9a20f).