qapi: Assert built-in types exist
QAPISchema.lookup_type('FOO') returns a QAPISchemaType when type 'FOO'
exists, else None. It won't return None for built-in types like
'int'.
Since mypy can't see that, it'll complain that we assign the
Optional[QAPISchemaType] returned by .lookup_type() to QAPISchemaType
variables.
Add assertions to help it over the hump.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-ID: <
20240315152301.
3621858-13-armbru@redhat.com>
Reviewed-by: John Snow <jsnow@redhat.com>