Use CARD32 instead of Atom, drag in XkbClientMapRec

Use CARD32 instead of Atom, drag in XkbClientMapRec

On 64-bit architectures, XID varies in size between the server (always
32 bits), and non-server (always unsigned long) for some inexplicable
reason.  Use CARD32 instead to avoid this horrible trap.

This involves dragging in XkbClientMapRec so we don't get stuck in the
KeySym trap.

Signed-off-by: Daniel Stone <daniel@fooishbar.org>