In GL 5:4 aspect player's weapon is too tall and too narrow

[Doom_user]

In the GL renderer's 5:4 aspect ratio the player's weapon is both taller and narrower then it should be. I took some screenshots comparing it to the software renderer's 5:4 aspect ratio to demonstrate this.

weapon too tall screenshot
http://img269.imageshack.us/img269/4955/wpner1.png

weapon too narrow screenshot
http://img833.imageshack.us/img833/9778/wpner2.png

[Graf Zahl]

Fixed the width. The height is a bit more problematic though.