Blender Git Loki

DPAINT_OT_output_toggle operator was using an index option for what was really a toggle between 2 values, changed its index option to an enum.

if a value other than 1/0 was given it would use an uninitialized pointer too (compiler warning, review should pick up this stuff).

also renamed some RNA attrs:
output_name --> output_name_a
output_name2 --> output_name_b
do_output1 --> use_output_a
do_output2 --> use_output_b
do_smudge --> use_smudge
max_velocity --> velocity_max