A few damage type fixes

• Spikes now deal spike damage when popping out, instead of typeless damage. (Fixes #392 (closed))

• If the player has a Flame Shield, being in contact with lava in old-style special stages no longer affects the timer. (Resolves this MB bug report, with thanks to toaster!)

• Brak's electric barrier now deals damage to Elemental and Flame shields. (Resolves this MB bug report)

• Lavafalls and Pyrefly flames now also deal fire damage in situations where MF_FIRE is handled differently (such as old-style special stages).