Problem with gascan weapon

Hello,

I have installed this : http://www.garrysmod.org/downloads/?a=view&id=129838

It’s a gas can weapon and I would like to know how could I modify it to make it throwing gas only on the ground and not on the others players.

Does it exist a lua code to make it running like that ?

Thanks guys.

[lua]
if(player:GetEyeTrace().Entity:IsPlayer()) then return end
[/lua]