Associations/collections with undefined properties when columns not present in result set

[VividVisions]

When I map a result set with a result map where every possible association and collection is defined but the respective columns are missing (not just null), at least one object gets added as association/to the collection anyway, with every property undefined.

Version used: 1.1.2
This worked in older versions because the check there was for a falsy id property which included undefined and now the check uses the identity operator for null.

This should be fixed by also checking for undefined id properties and not just for null ids.