Rerouting of diagram connectors not triggered when shapes are resized using the node tool

[uellue]

Version Inkscape 0.91 r13725 Win7 64 bit

How to reproduce:
- Connect two shapes, for example boxes, with a diagram connector (see attached sample file)
- Resize the boxes with the Node tool

Observed behavior:
- The diagram connector is not rerouted
- This means it might end in open air
- Rerouting is only triggered when the shape is changed with the select and transform tool

Expected behavior:
- Any size or position change of the connected shapes, in particular changes done with the Node tool, trigger a reroute

Workaround:
- Move the shapes with the select and transform tool back and forth to trigger rerouting when necessary. --> That's unnecessary extra work.

[jazzynico (jazzynico)]

Confirmed on Crunchbang Waldorf, Inkscape 0.48.3.1 and trunk revision 14016.