Fix error

[Astralcircle]

After #3232 players started getting these errors for some unknown reason, this should fix it

[wire-master] addons/wire-master/lua/weapons/laserpointer/cl_init.lua:48: bad argument #1 to 'GetAttachment' (number expected, got nil)
1. GetAttachment - [C]:-1
 2. unknown - addons/wire-master/lua/weapons/laserpointer/cl_init.lua:48

[wrefgtzweve]

Strange error, could maybe be happening because the player/self? in :Setup is NULL so it never sets the var? players can become null after full updates, very specific and rare condition though doesn't make much sense