AllocDevicePair: Ensure XKB privates are initialised

Since we call directly into XKB and may be doing so before the extension
has been initialised, make sure its privates are set up first.  XTest
had a hack to do this itself, but seems cleaner to just make sure we do
it in AllocDevicePair.

Signed-off-by: Daniel Stone <daniel@fooishbar.org>
Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>
Signed-off-by: Keith Packard <keithp@keithp.com>

dix/devices.c

@@ -2674,6 +2674,8 @@ AllocDevicePair(ClientPtr client, const char *name,
 
     *ptr = *keybd = NULL;
 
+    XkbInitPrivates();
+
     pointer = AddInputDevice(client, ptr_proc, TRUE);
 
     if (!pointer)

test/xtest.c

@@ -76,8 +76,6 @@ xtest_init_devices(void)
     InitAtoms();
     SyncExtensionInit();
 
-    XkbInitPrivates();
-
     /* this also inits the xtest devices */
     InitCoreDevices();