[libgda] Don't show warnings in gda_timestamp_valid()

[Vivien Malerba <vivien src gnome org>]

commit da029e865bcaeb5b9cc0e0da5841ce4af50e63e8
Author: Vivien Malerba <malerba gnome-db org>
Date:   Tue Jul 23 22:09:29 2013 +0200

    Don't show warnings in gda_timestamp_valid()

 libgda/gda-value.c |   12 ++----------
 1 files changed, 2 insertions(+), 10 deletions(-)
---
diff --git a/libgda/gda-value.c b/libgda/gda-value.c
index f7a1a55..658c9fc 100644
--- a/libgda/gda-value.c
+++ b/libgda/gda-value.c
@@ -1360,18 +1360,10 @@ gda_timestamp_valid (const GdaTimestamp *timestamp)
 {
        g_return_val_if_fail (timestamp, FALSE);
 
-       GDate *gdate;
-
        /* check the date part */
-       gdate = g_date_new_dmy ((GDateDay) timestamp->day, (GDateMonth) timestamp->month,
-                               (GDateYear) timestamp->year);
-       if (!gdate)
-               return FALSE;
-       if (! g_date_valid (gdate)) {
-               g_date_free (gdate);
+       if (! g_date_valid_dmy ((GDateDay) timestamp->day, (GDateMonth) timestamp->month,
+                               (GDateYear) timestamp->year))
                return FALSE;
-       }
-       g_date_free (gdate);
 
        /* check the time part */
        if (timestamp->hour > 24 ||