These memory allocation functions return void *, and casting to
another pointer type is useless clutter.  Drop these casts.

If you really want another pointer type, consider g_new().

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Message-Id: <20220923120025.448759-3-armbru@redhat.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>