Probably somewhere in AI_Player or HUD_TPSGame. Don't have DNC's or Yuri's source on my HDD. And therefore can't look.
EDIT:
AI_Player.cpp Line 3310:
Code:
// IF PLAYER IS FAST LOAD ON PLAYER CANT MOVE 12sec because fastload problem.
// wait 12 secs for fastload load building around player.
// prevPos2 = GetPosition();
if (g_FastLoad->GetBool() && r3dGetTime() > gClientLogic().localPlayerConnectedTime + 12 && gClientLogic().localPlayer_ == this)
controller->Move(vel * TimePassed, 0.5f);
if (!g_FastLoad->GetBool())
controller->Move(vel * TimePassed, 0.5f);
prevPos = GetPosition();
controller->prevpos = GetPosition();
parent::Update(); // manually update position after updating physics. Needed for camera, otherwise it will be lagging one frame behind