Blender Git Loki

Partial fix [#30744] BMesh: Particle system face/volume emission doesn't work if there is a constructive modifier earlier.

When ORIGSPACE is added, it is now a loop data, so we need to mark tessdata as dirty too. Also fixed DM_ensure_tessface to check DM_DIRTY_TESS_CDLAYERS flag!

This fixes problems with subsurf + dynapaint + particles, however, some modifiers, like remesh, seems to create a new dm from scratch, hence loosing completely those CD layers�?� Note this bug already existed in 2.62, so this is not a regression.