Make sure at compile time that the scalar type of the array
requested to be created via P9ARRAY_NEW() matches the scalar
type of the passed auto reference variable (unique pointer).

Suggested-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Christian Schoenebeck <qemu_oss@crudebyte.com>
Message-Id: <c1965e2a096835dc9e1d4d659dfb15d96755cbe0.1633097129.git.qemu_oss@crudebyte.com>