Xi: change XIChangeDeviceProperty from const pointer to const void *

According to Daniel Kurtz, a typedef void *pointer is a atomic type. So a
'const pointer' is equivalent to 'void* const' instead of the intended
'const void*'.

This technically changes the ABI, but we don't bump it for this.

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Reviewed-by: Chase Douglas <chase.douglas@canonical.com>

Xi/xiproperty.c

@@ -706,7 +706,7 @@ XIDeleteDeviceProperty (DeviceIntPtr device, Atom property, Bool fromClient)
 int
 XIChangeDeviceProperty (DeviceIntPtr dev, Atom property, Atom type,
                         int format, int mode, unsigned long len,
-                        const pointer value, Bool sendevent)
+                        const void *value, Bool sendevent)
 {
     XIPropertyPtr               prop;
     int                         size_in_bytes;