Revert "Bugfix: GetKeyboardMapping's keysyms list had the wrong length."

This was supposed to go on master. It helps to look at what branch I'm
on. sigh...

We'll pull this commit back from master next time we do a release.

This reverts commit 12c170e5.

src/xproto.xml

@@ -2014,7 +2014,10 @@ authorization from the authors.
       <field type="BYTE" name="keysyms_per_keycode" />
       <pad bytes="24" />
       <list type="KEYSYM" name="keysyms">
-        <fieldref>length</fieldref>
+        <op op="*">
+          <fieldref>length</fieldref>
+          <value>4</value>
+        </op>
       </list>
     </reply>
   </request>