Mention datatype() casting change.

doc/src/sgml/release.sgml

 <!--
-$Header: /cvsroot/pgsql/doc/src/sgml/release.sgml,v 1.106 2001/12/27 00:04:44 momjian Exp $
+$Header: /cvsroot/pgsql/doc/src/sgml/release.sgml,v 1.107 2001/12/27 04:46:08 momjian Exp $
 -->
 
 <appendix id="release">
@@ -348,7 +348,7 @@ Optimize length functions when using single-byte encodings (Tatsuo)
 Fix path_inter, path_distance, path_length, dist_ppath to handle closed paths (Curtis Barrett, Tom)
 octet_length(text) now returns non-compressed length (Tatsuo, Bruce)
 Handle "July" full name in date/time literals (Greg Sabino Mullane)
-datatype(const,...) function calls now evaluated earlier
+Some datatype() function calls now evaluated differently
 </literallayout>
    </sect3>