QC: Fix call to `__NULL__` in `teleport_use`, move away from `SUB_Null` macro

[MotoLegacy]

Fixes behaviors when non-clients interact with trigger_teleport via .use causing execution of __NULL__. Also replaces all references of the SUB_Null-> __NULL__ macro with __NULL__ outright, suggested to mitigate confusion.

Also opts into building with -O3, verified that optimizations only cause issues when compiling mutators, which LibreQuake is not.

[lavenderdotpet]

oh i didnt see this

[lavenderdotpet]

got it to crash in ironwail

[MotoLegacy]

Can you make sure you're not just building and replacing progs.dat? Quakespasm derivatives will always use the progs.dat inside of .pak files, ignoring any attempt to "override" them.

[lavenderdotpet]

got it to crash in ironwail

so some how theres a phantom progs.dat floating around so this wasnt the issue since i tested it ina new git clone and the bug was fixed

but

theres a new bug monsters dont get teleported when they are meant to

[MotoLegacy]

[lavenderdotpet]

wooo