mac_ddb: Fix the show rman validator.

[jhb]

Summary

The validator always returned true due to an incorrect check.

Sponsored by: DARPA

[jhb]

FWIW, in downstream CheriBSD I've basically changed all of these to not use void * casts and instead cast the first item to an integer type (think uintptr_t).

[imp]

sys/security/mac_ddb/mac_ddb.c

188

the second one certainly is more discriminating :)

[imp]

In D36125#820154, @jhb wrote:

FWIW, in downstream CheriBSD I've basically changed all of these to not use void * casts and instead cast the first item to an integer type (think uintptr_t).

I think that's a better fix to compare against db_expr_t anyway.

[mhorne]

Yikes! Thank you.