Blender Git Loki

Cleanup depsgraph access in particle_edit.c

'PE_set_data' / 'PE_set_view3d_data' would give us a depsgraph already,
so use it.

Also fix access to PEData->depsgraph without calling 'PE_set_data' prior.

Addresses concern raised in rBcf2c09002fae.

Reviewed By: sergey

Differential Revision: https://developer.blender.org/D6067