Vega Strike Code

in_joystick had a condition that gcc would sometimes optimize out. Basically, numaxes should equal the smaller of what SDL is reporting or MAX_AXES... original code didn't adhere to this limit, though luckily MAX_AXES is so big we never encountered issues. Fixed it to behave logicall.

some minor cleanups (shouldn't do any harm

Revert last "optimization" - misguided it was, because -O3 was missing

Avoid copying arguments in XVector

Avoid numeric imprecision in lerp

Optimize particles by killing them faster

Small micro-optimization of GameUnit::Draw for out-of-view units (do not compute unneeded stuff at cam_setup_phase)

prettier fix for my screwup

universe significantUnits funcction had two issues, 1 it kept checking if our c++ function that only returns significant units was returning significant units ...dumb... and 2 it never set un back to iter.current(), yielding the same unit returned by any python call to this function

remove deprecated huge comment block out of env_map_gent, and fix up script_call_unit_generic to utilize UnitUtil functions that already exist for the purposes being used in here as a python wrapper, ensuring coherency between python and C++