Reparent algorithm complete when no edge is involved.
Reparent algorithm complete when no edge is involved.

rdebroiz/dtk,d-tk/dtk,d-tk/dtk,NicolasSchnitzler/dtk,NicolasSchnitzler/dtk,rdebroiz/dtk,NicolasSchnitzler/dtk,rdebroiz/dtk,NicolasSchnitzler/dtk,d-tk/dtk,rdebroiz/dtk,d-tk/dtk,d-tk/dtk,d-tk/dtk