When respawning pedestrians, only animate nearby pedestrians

[madebr]

Only animate the respawn when we are in viewing distance.
This is done such that the "Peds visible on map" powerup draws far away items.
Far away animated pedestrians would otherwise remain invisible on the map until we get close to them.

Fixes #206

[dethrace-labs]

Why would far away animated pedestrians be invisible on the map?

[madebr]

The current action is used to decide whether a ped needs to be drawn on the map here:

dethrace/src/DETHRACE/common/pedestrn.c

Lines 2429 to 2438 in a15d62f

	// Item is a human
	if (pedestrian->hit_points == -100
	|| pedestrian->current_action == pedestrian->fatal_car_impact_action
	|| pedestrian->current_action == pedestrian->fatal_ground_impact_action
	|| pedestrian->current_action == pedestrian->giblets_action) {
	return 0;
	} else {
	BrVector3Copy(pPos, &pedestrian->pos);
	return 1;
	}

Using hit_points alone to decide whether a ped is alive does not work either.
I think what we're seeing here is layers upon layers of technical debt :)