use local coordinates instead of global in avatar::rebuild_aim_cache()

[PatrikLundell]

Summary

None

Purpose of change

Fix #74111
Feed relative coordinates into an operation that uses relative coordinate calculations, rather than global coordinates.

Describe the solution

Pass the just computed local coordinates into calc_steadiness rather than the global one fed to rebuild_aim_cache.

Describe alternatives you've considered

Continue to wait for someone to respond to #74111.

Testing

It compiles. I have no idea how to test it.

Additional context

It doesn't seem to be hugely important that most steadiness calculations are against targets extremely far away, but it's possible correcting the code might result in a faster aim when the target is actually considered to be nearby.

[osuphobia]

It's causing a segfault when aiming.

[PatrikLundell]

Confirmed.

There is a serious bug lurking here.
Debugging I see it's caught in a recursive loop:
:
cataclysm-tiles.exe!avatar::rebuild_aim_cache() Line 1275 C++
cataclysm-tiles.exe!calc_steadiness(const Character & you, const item & weapon, const tripoint & pos, double predicted_recoil) Line 1180 C++
cataclysm-tiles.exe!calculate_aim_cap(const Character & you, const tripoint & target) Line 1166 C++
cataclysm-tiles.exe!Character::sees(const Creature & critter) Line 11372 C++
cataclysm-tiles.exe!Creature::sees(const Creature & critter) Line 488 C++
cataclysm-tiles.exe!Character::sees(const tripoint & t, bool __formal, int __formal) Line 11338 C++
cataclysm-tiles.exe!map::pl_sees(const tripoint & t, int max_range) Line 808 C++
cataclysm-tiles.exe!map::apparent_light_helper(const level_cache & map_cache, const coords::coord_point<tripoint,5,0,0> & p) Line 694 C++
cataclysm-tiles.exe!avatar::cant_see(const coords::coord_point<tripoint,5,0,0> & p) Line 1255 C++
cataclysm-tiles.exe!avatar::rebuild_aim_cache() Line 1275 C++

Edit:
Written #74315 fixing it (i.e. blocking the spiral, but does nothing about the convoluted code allowing a recursion in the first place).