Blender Git Loki

Fix #36076: Metaballs as particles with particle texture (size influence) crashes Blender

Issue was caused by size influence affecting on object's matrix, which
is nice by it's own. But mball code was using ob->size to check whether
it's zero-sized object or not, but then was using ob->obmat to scale
the meta elements.

This lead to situation when zero-sized elements were trying to tessellate,
which is for sure a really bad idea.