Blender Git Loki

Dynapaint: fix use of normal normalization in dynamicPaint_generateBakeData().

Vertex's normal is always normalized - and its conversion from short to float should not change that!
On the other hand, linear interpolation of three normals **does not give a normalized vector**
(unless all three inputs are exactly the same).

Also, minor optimization, avoid recomputing that interpolated normal twice for each PaintUVPoint.