Improve join in rotate copies LPE
When fusing or kaleidoscoping a rotate copies LPE the joinin nodes are dupled.
This code remove duples from result going to all curves of the paths and ignoring degenerate
Edited by Jabier Arraiza
When fusing or kaleidoscoping a rotate copies LPE the joinin nodes are dupled.
This code remove duples from result going to all curves of the paths and ignoring degenerate