[BUG] Modern SSG pellets have no vertical spread, if autoaim is enabled

[AbsolutePsycho]

UZDoom 4.14.3
Map: Any
Other mods: No
Error: No
Description: Modern SSG pellets have no vertical spread, if autoaim is enabled.

I have been trying to fix this, and kinda found the solution, but it's not complete:
-- If the player has Autoaim disabled, works correctly
-- If the player has Autoaim enabled and Mouselook disabled and is looking straight forward(!), works correctly
-- If the player has Autoaim enabled and Mouselook enabled (for some stupid reason, but nonetheless), the pitch will be calculated incorrectly (like it's is being doubled). So I added !CheckFreeLook() just for that. Maybe there is a better way, like subtract player's current vertical view angle or something?

action void BD_FireModernBullet(Class<Actor> bullet, double spread_horz = 0., double spread_vert = 0., int numbullets = 1, bool useammo = true) {
	if (numbullets < 1) numbullets = 1;
	let weapon = player.ReadyWeapon;
	if (!weapon || (useammo && !weapon.DepleteAmmo(weapon.bAltFire, true)))
		return;
	
	// ### Doesn't work correctly with Autoaim enabled and Mouselook enabled, if player's view vertical angle is non-zero
	double pitch = 0.;
	if (!CheckFreeLook()) pitch = BulletSlope(); // ### UPD: this works, unless the player looks not forward and then disables Mouselook
	//if (sv_noautoaim == 0) pitch = BulletSlope(); // ### not sure how to properly check autoaim, maybe should also check player.GetAutoaim()<35 or smth?
	
	// Alert the monsters:
	A_AlertMonsters();
	// Activate shootable linedefs:
	LineAttack(angle, PLAYERMISSILERANGE, pitch, 0, 'Normal', "BD_NullPuff", LAF_NOIMPACTDECAL, offsetforward: radius);
	
	vector2 spread = (0.,0.);
	for (int i = 0; i < numbullets; i++) {
		spread.x = random2[BDFireBull]() * spread_horz / 255.;
		spread.y = pitch + ( random2[BDFireBull]() * spread_vert / 255. );
		//spread.y = BulletSlope() - pitch + ( random2[BDFireBull]() * spread_vert / 255. );

		A_FireProjectile(
			bullet, 
			angle: spread.x,
			useammo: false,
			spawnheight: 2.,
			flags: FPF_NOAUTOAIM, // ### otherwise Modern SSG pellets have no vertical spread if Autoaim is enabled
			pitch: spread.y
		);
	}
}