[FIX] onAttributeChanged new value was always undefined
[FIX] onAttributeChanged new value was always undefined

playcanvas/engine,SuperStarPL/engine,sereepap2029/playcanvas,H1Gdev/engine,shinate/engine,H1Gdev/engine,nizihabi/engine,SuperStarPL/engine,aidinabedi/playcanvas-engine,MicroWorldwide/PlayCanvas,maxwellalive/engine,sanyaade-teachings/engine,aidinabedi/playcanvas-engine,shinate/engine,horryq/engine-1,maxwellalive/engine,horryq/engine-1,nizihabi/engine,3DGEOM/engine,guycalledfrank/engine,horryq/engine-1,RainsSoft/engine,maxwellalive/engine,RainsSoft/engine,sereepap2029/playcanvas,shinate/engine,3DGEOM/engine,SuperStarPL/engine,sanyaade-teachings/engine,RainsSoft/engine,sanyaade-teachings/engine,guycalledfrank/engine,playcanvas/engine,sereepap2029/playcanvas,nizihabi/engine,3DGEOM/engine,MicroWorldwide/PlayCanvas