This reverts commit da1d2a66.

Otherwise you get "Uncaught TypeError: Cannot call method 'getInverse' of undefined".

This fixes broken custom blending example.

ColladaLoader is apparently creating parameter objects looking like this { "color" : undefined }

Still some broken examples: everything involving Collada, also dynamic cubemap cars.

Still there is something very weirdly wrong, exhibited in CTM materials example.

Some material things are still broken, need to investigate.