RequireMessage errors when interface name equals existing variable

[bartvanerp]

Consider the node

@node DemoNode Deterministic [ out, z ]

used in the partial model

z ~ ...
y ~ DemoNode(z) where { pipeline = RequireMessage(z = ...) }

The model construction in this case will fail with the error: Invalid name 'z' for new random variable. 'z' has already been initialized with the '=' operator. This error is caused by the interface having the same name as the variable.
Renaming the variable z in the model solves the issue for now.

[wouterwln]

As of the current implementation, the model macro will never go into the where clause and instead immediately pass this to the underlying DemoNode node, so I assume this issue is fixed.