qapi: fix qapi_dealloc_type_size parameter type

qapi: fix qapi_dealloc_type_size parameter type

The second parameter to qapi_dealloc_type_size should be a uint64_t *,
not a size_t *. This was causing our 32 bit x86 build to fail, since
warnings are treated as errors.

Signed-off-by: Bruce Rogers <brogers@suse.com>
Reviewed-by: Michael Roth <mdroth@linux.vnet.ibm.com>
Reviewed-by: Stefan Weil <sw@weilnetz.de>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
(cherry picked from commit 1d16252652688a775b244fffa1b9ac9b719ceffc)

Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>