[yokomo]

Here is the stocks for current Sven Co-op update (version 4.7)

Stocks:

sc_get_monster_ally(entity)
sc_get_user_deaths(client)
sc_set_user_deaths(client, deaths)
sc_get_cur_weapon_entity(client)
sc_get_weapon_id(entity)
sc_get_weapon_ammo(entity)
sc_set_weapon_ammo(entity, clip)
sc_get_user_bpammo(client, weapon)
sc_set_user_bpammo(client, weapon, ammo)
sc_get_user_bpammo2(client) //Use for m16 grenade
sc_set_user_bpammo2(client, ammo) //Use for m16 grenade
sc_get_user_longjump(client)
sc_set_user_longjump(client, longjump)

Credits:
- ConnorMcLeod
- Joropito

[Bos93]

I think you need to check

if( pev_valid( client ) != 2 ) return -1;

For get_pdata_cbase