Xi: remove superfluous cast.

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>

Xi/listdev.c

@@ -121,7 +121,7 @@ SizeDeviceInfo(DeviceIntPtr d, int *namesize, int *size)
 static void
 CopyDeviceName(char **namebuf, const char *name)
 {
-    char *nameptr = (char *) *namebuf;
+    char *nameptr = *namebuf;
 
     if (name) {
         *nameptr++ = strlen(name);