"Forge" card can crash game if all relevant piles are depleted

What steps will reproduce the problem?
1. Deplete all piles of a certain value (e.g.: deplete the Coppers and the 
Curses, which together are the only cards costing 0)
2. Play a Forge card, trashing cards equal to the value of the depleted piles 
(e.g.: in this case, trash a bunch of coppers and curses)
3. Play freezes.

What is the expected output? What do you see instead?
Expected: this should be a free trash since there are no available cards of the 
value. (Just as if you trash cards worth, say, 10 or 12, it's a free trash 
because there are no cards costing that amount).
Instead: Game freezes and you can't continue.

What version of the product are you using? On what operating system?
Androminion 4.01
Android version 2.3.7 on ADR6300 (HTC Incredible)
CyanogenMod 7.2.0

Please provide any additional information below.
Screenshot attached.

Original issue reported on code.google.com by gidklio...@gmail.com on 15 Aug 2014 at 6:57

Attachments:

[2014-05-15 13.04.32.png](https://storage.googleapis.com/google-code-attachments/androminion/issue-653/comment-0/2014-05-15 13.04.32.png)

novendraap / androminion

"Forge" card can crash game if all relevant piles are depleted #653