[TW] Core/player: SetHas310Flyer Big Love Rocket & Invincible

Fixes issue where after a player gets Big Love Rocket or Invincible
other scaling mounts not going at 310% such as Swift Flight and
celestial steed.
Merge pull request #44 from gecko32/patch3

[TW] Core/player: SetHas310Flyer Big Love Rocket & Invincible