Infinite radius point lights might cause type overflow

[riccardobl]

There is this workaround in place to prevent the engine from dealing with infinite radius lights:

jmonkeyengine/jme3-core/src/main/java/com/jme3/light/PointLight.java

Lines 169 to 171 in 8cc3086

	if (radius == Float.POSITIVE_INFINITY) {
	radius = Float.MAX_VALUE;
	}

but it might still lead to unexpected behavior due to type overflow in the shaders' math and potentially in other places in the engine.

A better workaround would be to limit the radius to MAX_VALUE/4 or something like that.

Afaik infinite radius point lights are used only by the gltf loader, and will not be used anymore after #2549 .
This might also be connected to #2565