The parameters for the flames sprite were incorrect, causing the reverse
side of the sprite to appear as an opaque black rectangle. Use the
correct incantation.
The crash occurs if mcl_burning:data is deserialized to nil. The cause of
mcl_burning being set to "return nil" is unknown. Therefore, when it occurs, it
will be logged as warning.
- Use upright_sprite for 3rd person flame display, which is both closer to minecraft and allows for client side texture animation
- Take care of flame HUD in the MineClone2Client