Add #:tag to the docs for define-cpointer-type

[LeifAndersen]

No description provided.

[mflatt]

Sorry for being late here, but the docs should have tag-expr, not tag-id. That is, the optional #:tag form has an expression that should produce a tag value, not necessarily an identifier.

[LeifAndersen]

Woops, my apologies. I would be happy to change that. While I'm at it, anything else that you would like changed?

[mflatt]

Nothing else - thanks for the improvement!