Fix bug #80037

If we're accessing an uninitialized typed property and __get is
defined, don't perform a read_property callback, as __get is
supposed to have no effect on uninitialize

Fix bug #80037

If we're accessing an uninitialized typed property and __get is
defined, don't perform a read_property callback, as __get is
supposed to have no effect on uninitialized typed properties.
Usually it doesn't, but by-reference assignments cannot be
performed through read_property.

I'm deleting the test for bug #80039 again, as it doesn't really
make sense anymore with this fix.

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