nested parameter callback is no more called after parent node renaming

[avilleret]

• create a node, create a nested node with a parameter
• add a callback on the parameter
• push a value -> the callback is called
• rename the upper most node
• push a value -> the callback is no more called

see https://github.com/ossia/libossia/blob/master/tests/Network/OSCQuery_rename.cpp#L99-L195

[jcelerier]

fixed by 7b38678be6707d361a01921653a656f0ccd7a2fd