Spread control: override the server FireBullets seed for the local player

The installed 2024 server ignores the client usercmd random_seed and uses its
own shot seed. Force the server's CBaseEntity::FireBullets RandomSeed call for
the local player only:

- hook the server.so RandomSeed GOT slot (R_386_JUMP_SLOT at 0xce1348);
- read the FireBullets `this` from the caller frame and compare it with the
  local server player base;
- replace the seed with the precomputed best single/shotgun window and step it
  per pellet; NPC shots and everything else pass through.
- client prediction still uses the same chosen usercmd seed, so both sides
  agree on the spread pattern.

1 files changed, 2 insertions, 0 deletions

diff --git a/src/hl2h.h b/src/hl2h.h
index ef8e8d6..285b591 100644
--- a/src/hl2h.h
+++ b/src/hl2h.h
@@ -151,6 +151,8 @@ bool silent_aim_apply(CUserCmd *cmd);
 bool melee_weapon_active(void *local_ent);
 bool melee_aimbot_apply(CUserCmd *cmd);
 bool spread_control_apply(CUserCmd *cmd, void *local_ent);
+int spread_best_seed(int pellets);
+extern int g_spread_pellets;
 enum FeatureId {
   FEAT_BHOP = 0,
   FEAT_ABH = 1,