It's hard to keep something like that up to date. There are multiple libraries floating around and not all use the same signature format. The list might get out of date from a signature not being used by any major developer. People can forget to update it. For those who are good at finding signatures, it becomes more work.
SourceMod's gamedata files are almost always up to date against the latest games, so that's a good place to check first.
FYI, CBaseEntity::Spawn is virtual - no memory scanning needed. And for virtual functions the tables @ the AlliedModders wiki are usually usable (see
http://wiki.alliedmods.net/Virtual_O...Source_Mods%29).
__________________