Fixes Bug #3209

[Filipe2004]

Tux wasn't able to stand on or jump off a frozen badguy that was bouncing of a trampoline, getting stuck in the falling animation while on the frozen badguy. To solve this I added a verification on Player::collision for when the badguy is frozen and the player hits bottom. Inside the if I adapted the code on collision_solid so that it performs similar to when the player collides with a solid and the hit is on the bottom. Also added a verification for the velocity of the badguy, because for some reason if it is static it enter both the Player:collision and Player:collision_solid.

[tobbi]

Hey, @Filipe2004

thanks for your contribution! I see that you copied a lot of source code from the Player::collision_solid(CollisionHit&) method. I'd like to avoid having duplicate source code. I'd appreciate if you could simply call the function above with appropriate parameters instead.

[MatusGuy]

simply call the function above with appropriate parameters instead.

Don't do this. The collision_solid function is used by the collision system to run callbacks on static collision. Calling this function explicitly is confusing and can lead to unwanted side effects.
Instead, write a new function, and call it there and here.