error in the remove operator with hash slices

[davidnich]

inconsistent behavior with the remove operator and hash slices:

david@meteor:~/src/qore/git/qore/qlib/ServiceNowRestDataProvider$ qore -ne 'auto h = {"a": 1}; printf("%y\n", remove h{"b", "c"});'
{b: null, c: null}
david@meteor:~/src/qore/git/qore/qlib/ServiceNowRestDataProvider$ qore -ne 'auto h = {"a": 1}; printf("%y\n", h{"b", "c"});'
{}