Bug 24677: (bug 24002 follow-up) Incorrect DATE value: '00-00-0000' in C4/Serials.pm

Bug 24677: (bug 24002 follow-up) Incorrect DATE value: '00-00-0000' in C4/Serials.pm

Oops, wrong copy/paste here! The column order changes was not expected.

From bug 24002:
  commit 3d3336ed6607d80b72502075ebf9567cf48e1709
  Bug 24002: Incorrect DATE value: '00-00-0000' in C4/Serials.pm

The changes from this patch are like:
-            year(IF(serial.publisheddate="00-00-0000",serial.planneddate,serial.publisheddate)) as year,
+            year(IF(serial.publisheddate IS NULL,serial.publisheddate,serial.planneddate)) as year,

This is stilly, if publisheddate is null we do not want to return it.

It comes from a wrong copy/paste from the other commits:
-                        ORDER BY IF(publisheddate<>'0000-00-00',publisheddate,planneddate) DESC";
+                        ORDER BY IF(publisheddate IS NULL,planneddate,publisheddate) DESC";

="00-00-0000" vs <>"0000-00-00"

Test plan:
Eyeball the previous patches from bug 24002 and notice that the changes in the commit listed previously are wrong

Signed-off-by: Janusz Kaczmarek <januszop@gmail.com>
Signed-off-by: Joy Nelson <joy@bywatersolutions.com>