Sync structure with EN

Author: lacatoire

reference/image/functions/imageconvolution.xml

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <!-- $Revision$ -->
-<!-- EN-Revision: 213fbd9440a224f9c1da4942c85124ce0c120c52 Maintainer: yannick Status: ready -->
+<!-- EN-Revision: 213fbd9440a224f9c1da4942c85124ce0c120c52 Maintainer: lacatoire Status: ready -->
 <!-- Reviewed: yes -->
 <refentry xml:id="function.imageconvolution" xmlns="http://docbook.org/ns/docbook">
  <refnamediv>
@@ -100,6 +100,7 @@ imagepng($image, null, 9);
     </programlisting>
     &example.outputs;
     <mediaobject>
+     <alt>Affichage de l'exemple : Impression du logo PHP.net</alt>
      <imageobject>
       <imagedata fileref="en/reference/image/figures/imageconvolution_emboss.png"/>
      </imageobject>