PATCH: two small fixes for DateTime::Format::Pg

[Cees Hek]

Hi Claus,

I found a two small inconsistencies with DateTime::Format::Pg.
- format_interval does not exist, but it is documented
- format_duration does not work as a class method like all other public methods

They look more like oversights than bugs.  I have included a patch
that fixes the issues.

I am not currently subscribed to the datetime mailing list, so please
include me in any replies (I hope the list accepts mail from
non-subscribers!).

Cheers,

--
Cees Hek

--- Pg.pm.orig	2005-01-09 20:27:38.000000000 -0500
+++ Pg.pm	2005-01-09 20:29:20.000000000 -0500
@@ -815,7 +815,7 @@
 =cut
 
 sub format_duration {
-  my($du,%param) = @_;
+  my($self,$du,%param) = @_;
   croak 'DateTime::Duration object expected' unless UNIVERSAL::isa($du,'DateTime::Duration');
 
   my %deltas = $du->deltas();
@@ -835,6 +835,8 @@
   return $output;
 }
 
+*format_interval = \&format_duration;
+
 =back
 
 =cut