WAD not recognized by Doomsday

```
When run with the Blasphemer WAD, Doomsday engine drops to a "0 of 14 games 
playable" console rather than running the game.

Test was made with Doomsday 1.9.7 #439.

Needs investigation as to whether this is a setup issue, a problem with 
Blasphemer, or a problem with Doomsday.
```

Original issue reported on code.google.com by `gwessner` on 5 Apr 2012 at 12:46
