Create profile from selection

Created by: Durman

Problem statement

Profile parametric node can't create profile from selected curve.

Steps to reproduce

1. Convert plane to curve in a scene
2. Press from selection button on a profile parametric node
3. See a result

Expected result

No errors at least

Actual result

  File "C:\Users\User\AppData\Roaming\Blender Foundation\Blender\2.79\scripts\ad
dons\sverchok-master\nodes\generators_extended\profile_mk2.py", line 631, in exe
cute
    if ob_points[0].handle_left_type in types or ob_points[-1].handle_right_type
 in types:
IndexError: bpy_prop_collection[index]: index 0 out of range, size 0