hmp: Fix warning from smatch (wrong argument in function call) Fix this warning: hmp.c:414:38: warning: Using plain integer as NULL pointer qmp_query_block expects a pointer argument, so passing false is wrong. Cc: Luiz Capitulino <lcapitulino@redhat.com> Signed-off-by: Stefan Weil <sw@weilnetz.de> Reviewed-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>