DOCBOOK-APPS: [patch] fo:marker fix

I needed this patch to get passivetex (1.21) to accept the output from
the XSL stylesheets.  Is it correct, or a hack?

Thanks,
Tim.
*/

--- docbook-xsl-1.56.1/fo/sections.xsl.marker	2002-10-16 16:24:19.000000000 +0100
+++ docbook-xsl-1.56.1/fo/sections.xsl	2002-10-16 16:24:20.000000000 +0100
@@ -358,7 +358,7 @@
 
   <fo:block xsl:use-attribute-sets="section.title.properties">
     <fo:marker marker-class-name="section.head.marker">
-      <xsl:copy-of select="$title"/>
+      <xsl:value-of select="$title"/>
     </fo:marker>
     <xsl:choose>
       <xsl:when test="$level=1">