st/nine: Queries: remove dummy queries

st/nine: Queries: remove dummy queries

Applications are supposed to call CreateQuery with a NULL
ppQuery to know if the query is supported. We supported that.

However when ppQuery was not NULL, we were accepting to create the
query and were creating a dummy query even when the query is not
supported.

Wine has different behaviour. This patch drops the dummy queries
support and matches wine behaviour.

Reviewed-by: Ilia Mirkin <imirkin@alum.mit.edu>
Reviewed-by: David Heidelberg <david@ixit.cz>
Signed-off-by: Axel Davy <axel.davy@ens.fr>