[TF2] fix dragon's fury fireballs having incorrect projectile path

[wgetJane]

Description

the Dragon's Fury's fireballs seem to be the only projectiles with a spawn offset that don't get their path corrected to be pointed at the player's crosshair

this is because the df never uses the GetProjectileFireSetup method which handles projectile path correction:

source-sdk-2013/src/game/shared/tf/tf_weaponbase.cpp

Line 5645 in 7191ecc

void CTFWeaponBase::GetProjectileFireSetup( CTFPlayer *pPlayer, Vector vecOffset, Vector *vecSrc, QAngle *angForward, bool bHitTeammates /* = true */, float flEndDist /* = 2000 */)

this results in the fireballs being visibly offset to the bottom right of the player's crosshair

for this fix, i don't use the GetProjectileFireSetup method because it wouldnt be ideal for the df's projectiles which have 2 unique properties compared to other projectiles:

• it automatically deletes itself after traveling 500 units
• it's supposed to penetrate and deal damage to multiple players

video:

dragonfix.mp4

note: in this video, im using a keybind to toggle the fix on and off
also here's what the debug shapes mean:
- red = crosshair path starting from eyepos, up to 500 units
- green = correct expected projectile path starting from the projectile spawn offset, green box at 500 units is where the projectile should despawn
- blue = actual projectile path, blue box is the projectile's current position, blue line is the path it has traveled