Added missing <listitem>.

documentation/printing.sgml

diff --git a/documentation/printing.sgml b/documentation/printing.sgml
index 9f6144b..bbb39dd 100644
--- a/documentation/printing.sgml
+++ b/documentation/printing.sgml
@@ -158,6 +158,7 @@
 		each printer.
 	      </para>
 	    </listitem>
+	    <listitem>
 	      <para>
 		<userinput>regapi setValue &lt; ~/psdrv.reg</userinput>
 	      </para>