Bug 757621 - unclosed tag, c# generics method with where

In the routine the <dd> tag is used to do an indentation in the <dl> section, this <dd> was not closed in endConstraintList.
Problem existed from the beginning (version Release-1.5.2-20070719, commit 29a8f14)

src/htmlgen.cpp

@@ -2420,6 +2420,7 @@ void HtmlGenerator::endConstraintDocs()
 void HtmlGenerator::endConstraintList()
 {
   t << "</table>" << endl;
+  t << "</dd>" << endl;
   t << "</dl>" << endl;
   t << "</div>" << endl;
 }