Bug#662209: [vavoom] "a engine" is extended description

[Filipus Klutiero]

Package: vavoom
Version: 1.33-2
Severity: minor

The extended description starts with:

Vavoom is a engine based on sources of Doom, Heretic, Hexen and
a little bit from Quake.

"a engine" should read "an engine".

By the way, the short description says vavoom is advanced. The extended 
description should explain how vavoom is advanced.