Fix inverted positions introduced in #4648

[MillhioreBT]

• [x] I have followed [proper The Forgotten Server code styling][code].
• [x] I have read and understood the [contribution guidelines][cont] before making this PR.
• [x] I am aware that this PR may be closed if the above-mentioned criteria are not fulfilled.

Changes Proposed

I don't know if more tests are needed, but when this PR #4648 was merged apparently the npc, monsters always turn their back on the player, in fact there are things that seem to be broken, the directional spells don't work, if someone can check with exevo vis hur ect...

It was simply a pair of inverted variables.

Issues addressed: Nothing!

[ranisalt]

I don't know if more tests are needed

Always!