Reverted some changes to light classes which was not meant to be committed as part of #314.

jme3-core/src/main/java/com/jme3/light/Light.java

@@ -122,22 +122,6 @@ public abstract class Light implements Savable, Cloneable {
         setColor(color);
     }
 
-    /**
-     * Default constructor for Light.
-     */
-    public Light() {
-
-    }
-
-    /**
-     * Constructor which allows setting of the color.
-     *
-     * @param color the color to apply to this light.
-     */
-    public Light(final ColorRGBA color) {
-        this.color = color;
-    }
-
     /**
      * Returns the color of the light.
      * 

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

@@ -192,8 +192,8 @@ public class PointLight extends Light {
         } else {
             // Sphere v. box collision
             return FastMath.abs(box.getCenter().x - position.x) < radius + box.getXExtent()
-                    && FastMath.abs(box.getCenter().y - position.y) < radius + box.getYExtent()
-                    && FastMath.abs(box.getCenter().z - position.z) < radius + box.getZExtent();
+                && FastMath.abs(box.getCenter().y - position.y) < radius + box.getYExtent()
+                && FastMath.abs(box.getCenter().z - position.z) < radius + box.getZExtent();
         }
     }