[glib: 1/2] gutils: Add (nullable) annotation to g_get_prgname()

[Philip Withnall <pwithnall src gnome org>]

commit c1c26448b101f1257e886d273378e23005c82d57
Author: Philip Withnall <withnall endlessm com>
Date:   Wed Apr 3 12:31:44 2019 +0100

    gutils: Add (nullable) annotation to g_get_prgname()
    
    It can return NULL if no program name has been set yet (i.e.
    g_set_prgname() has not been called from somewhere).
    
    Signed-off-by: Philip Withnall <withnall endlessm com>

 glib/gutils.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
---
diff --git a/glib/gutils.c b/glib/gutils.c
index 2e2d45785..b4ca1cc3f 100644
--- a/glib/gutils.c
+++ b/glib/gutils.c
@@ -1037,7 +1037,8 @@ static gchar *g_prgname = NULL;
  * #GtkApplication::startup handler. The program name is found by
  * taking the last component of @argv[0].
  *
- * Returns: the name of the program. The returned string belongs 
+ * Returns: (nullable): the name of the program, or %NULL if it has not been
+ *     set yet. The returned string belongs
  *     to GLib and must not be modified or freed.
  */
 const gchar*