Using error_is_set(errp) that way can sweep programming errors under
the carpet when we get called incorrectly with an error set.
qmp_query_rx_filter() breaks its loop when it detects an error. It
needs to set another error when the loop completes normally.
Return right away instead of merely breaking the loop.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
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