Blender Git Loki

Code cleanup: simplify the DerivedMesh.drawMappedFaces interface.

This function pointer's 'setDrawOptions' parameter took a slightly
different type than the other drawing callbacks. In particular, it
could set a 'drawSmooth' value to indicate that smoothing should
always be enabled, overriding the face flag. However, all callbacks
either did not set this value, or set it unconditionally to
1. Replaced this by adding a new 'flag' parameter to drawFacesMapped,
which can be set to DM_DRAW_ALWAYS_SMOOTH where appropriate.

Also removed the 'useColors' parameter and replaced it with another
flag value, DM_DRAW_USE_COLORS.

Removed the 'wpaint__setSolidDrawOptions' callback, was only being
used to set the shading to smooth.