Blender Git Loki

Fix: memory leak after type conversion in geometry nodes group

The leak happened when two things were true:
* Inside of a node group a socket is linked to a Group Input that has
a different type.
* The corresponding input on the parent Group node is not linked.

The conversion happened correctly, but the original value wasn't
destructed.

Cleanup: quiet asan warning because of uninitialized variable

Fix T92327: use default value when field is passed into data socket

Previously, the computed value passed into the data socket could depend
on the actual field a bit. However, given that the link is marked as invalid
in the ui, the user should not depend on this behavior.
Using a default value is consistent with other cases when there are
invalid links.

Merge branch 'master' into virtual-array-value-type

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Merge branch 'master' into soc-2020-io-performance