[Bug]: Wrong direction for a wallkick

[STEMathematics]

SuperTux Version

supertux2 dev v0.7.0-beta.2 - 9644491 (master)

System Information

Linux Mint 22.3 - Cinnamon 64-bit

Expected Behavior

Tux wallkicks away from the wall.

Actual Behavior

If Tux slips off a ledge with a kickable wall to the right and quickly jumps, he moves to the right even though he has kicked a wall to his right.

klip_1.771.358.322.778.mp4

Steps To Reproduce Actual Behavior

1. Star the level Bouncy, Bouncy Mountainside (Icy Island).
2. Climb the third pair of kickable walls.
3. Approach the ledge containing the kickable wall.
4. Slowly step into the hole.
5. As soon as you begin falling, immediately press the jump key.

Additional Information

I have been unable to reproduce this bug in the other direction (left instead of right).

Guidelines For Reporting Issues

• I have read https://github.com/SuperTux/supertux/blob/master/CONTRIBUTING.md#bug-reports.
• I have verified this isn't an issue that's already been reported.
• I have verified this isn't a discussion, or an issue about a crash or a feature request, but rather an actual bug ─ that is, the game did something not intended.
• I have verified this issue is not about wrong translations (use Transifex for those), or anything unsupported (e.g. third-party add-ons).
• In this report, I have only included details about one (1) bug.
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