bugfix in rtcSetBuffer of USER_VERTEX_BUFFER, user vertex buffer has now again default size of numVertices
bugfix in rtcSetBuffer of USER_VERTEX_BUFFER, user vertex buffer has now again default size of numVertices

Sjoerdie/embree,Sjoerdie/embree,Sjoerdie/embree,Sjoerdie/embree,embree/embree,embree/embree,embree/embree,embree/embree