[glib] Revert the g_set_prgname change

[Matthias Clasen <matthiasc src gnome org>]

commit 7db8b92b979b2f95268d42eecf9dc7a361e6f5d1
Author: Matthias Clasen <mclasen redhat com>
Date:   Mon Dec 21 09:11:23 2009 -0500

    Revert the g_set_prgname change
    
    This change breaks our API and causes warnings from essentially all applications.
    See bug 563627.

 glib/gutils.c               |   11 ++---------
 glib/tests/option-context.c |    2 --
 2 files changed, 2 insertions(+), 11 deletions(-)
---
diff --git a/glib/gutils.c b/glib/gutils.c
index b5e9c19..744663e 100644
--- a/glib/gutils.c
+++ b/glib/gutils.c
@@ -1968,17 +1968,10 @@ g_get_prgname (void)
 void
 g_set_prgname (const gchar *prgname)
 {
-  gboolean already_set = FALSE;
-
   G_LOCK (g_prgname);
-  if (g_prgname)
-    already_set = TRUE;
-  else
-    g_prgname = g_strdup (prgname);
+  g_free (g_prgname);
+  g_prgname = g_strdup (prgname);
   G_UNLOCK (g_prgname);
-
-  if (already_set)
-    g_warning ("g_set_prgname() called multiple times");
 }
 
 G_LOCK_DEFINE_STATIC (g_application_name);
diff --git a/glib/tests/option-context.c b/glib/tests/option-context.c
index 14fd9d9..8b6292a 100644
--- a/glib/tests/option-context.c
+++ b/glib/tests/option-context.c
@@ -1770,13 +1770,11 @@ main (int   argc,
   g_test_add_func ("/context/add", add_test1);
 
   /* Test parsing empty args */
-#if 0
   /* This test relies on the ability to call g_set_prgname() more
    * than once (without incurring a g_warning), which is no longer
    * the case.
    */
   g_test_add_func ("/context/empty1", empty_test1);
-#endif
   g_test_add_func ("/context/empty2", empty_test2);
   g_test_add_func ("/context/empty3", empty_test3);