HudGaugeOffscreen::calculatePosition could return without writing its
outputs, either when the eye vertex overflowed or when the clipped
point landed a pixel or two inside the clip rectangle. The caller drew
anyway, so the indicator appeared at a random spot with a random
orientation that changed every frame. This showed up when targeting a
subsystem on a distant ship, where the clip loses enough precision to
hit the second case.
calculatePosition now returns whether it found a position, and both
callers skip drawing when it did not. The inside case falls back to
the nearest screen edge, since the point is already known to be off
screen, so the indicator stays steady instead of blinking.
Co-Authored-By: Claude Fable 5.1 <[email protected]>
