Blender Git Loki

Fix [#24201] COLLADA Exporter: Light source energy incorrect

lamp->energy and lamp->distance are now taken in account by calculating
the constant, linear and quadratic attenuations based on this.

The import tries to do the reverse.

Note: this will work only properly for lamps that have att1 and att2 set to
1.0 or 0.0, other lamptypes won't import correctly again.