games/fishfight: unbreak fetch

> Fetched file size mismatch (expected 37001979, actual 37001164)

Reported by: pkg-fallout

(cherry picked from commit 5701475c6e5dc89322e29bac9ab0c0f70a53b3db)
(cherry picked from commit ba6e2c77bb56f83368d1e7acea7d597c4cd6bb0a)