Zombies walk into walls

[sionleroux]

Zombies walk into walls with great perseverance:

I know they are dumb but this makes the game look lame. Zombies should not start attacking you if you are not in their line of site, even when you are in range. For line of site, the same approach could be used as for firing with the gun, to check if there are any walls between the zombie and the player.