Fixed Tails gets stuck in his flying state if grav-flipped while touching the ground

[PHCC]

I was speedrunning ERZ2 as Tails when I found this bug, so here's the lump of my last try:

https://www.dropbox.com/s/yeofoc98l2yissn/MAP23-tails-last.lmp

The bug is right in the begginning, and I was too lazy to make a GIF.