Fix prediction error when crouchjumping

src/game/shared/gamemovement.cpp

@@ -4011,6 +4011,18 @@ void CGameMovement::PlayerRoughLandingEffects( float fvol )
 	}
 }
 
+//-----------------------------------------------------------------------------
+// Purpose: Reset interpolation when player duck state changes
+// Input  : direction - 
+//-----------------------------------------------------------------------------
+void CGameMovement::ResetDuckLatched()
+{
+#ifdef CLIENT_DLL
+	if ( !player->InFirstPersonView() )
+		player->ResetLatched();
+#endif
+}
+
 //-----------------------------------------------------------------------------
 // Purpose: Use for ease-in, ease-out style interpolation (accel/decel)  Used by ducking code.
 // Input  : value - 
@@ -4133,9 +4145,7 @@ void CGameMovement::FinishUnDuck( void )
 
 	mv->SetAbsOrigin( newOrigin );
 
-#ifdef CLIENT_DLL
-	player->ResetLatched();
-#endif // CLIENT_DLL
+	ResetDuckLatched();
 
 	// Recategorize position since ducking can change origin
 	CategorizePosition();
@@ -4232,9 +4242,7 @@ void CGameMovement::FinishDuck( void )
    		VectorAdd( mv->GetAbsOrigin(), viewDelta, out );
 		mv->SetAbsOrigin( out );
 
-#ifdef CLIENT_DLL
-		player->ResetLatched();
-#endif // CLIENT_DLL
+		ResetDuckLatched();
 	}
 
 	// See if we are stuck?

src/game/shared/gamemovement.h

@@ -227,6 +227,7 @@ protected:
 	void			FinishUnDuckJump( trace_t &trace );
 	void			SetDuckedEyeOffset( float duckFraction );
 	void			FixPlayerCrouchStuck( bool moveup );
+	void			ResetDuckLatched();
 
 	float			SplineFraction( float value, float scale );