[glib] gmain: child sources must always have same priority as parent

[Dan Winship <danw src gnome org>]

commit 532f463eaf48d6a560977fd64479cfa05433162e
Author: Dan Winship <danw gnome org>
Date:   Wed Apr 11 10:22:45 2012 -0400

    gmain: child sources must always have same priority as parent
    
    A child source does not have a priority of its own; it must have the
    same priority as its parent. Enforce this in
    g_source_set_priority_unlocked().
    
    https://bugzilla.gnome.org/show_bug.cgi?id=619329

 glib/gmain.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/glib/gmain.c b/glib/gmain.c
index 2417680..60554f5 100644
--- a/glib/gmain.c
+++ b/glib/gmain.c
@@ -1367,6 +1367,9 @@ g_source_set_priority_unlocked (GSource      *source,
 {
   GSList *tmp_list;
   
+  g_return_if_fail (source->priv->parent_source == NULL ||
+		    source->priv->parent_source->priority == priority);
+
   source->priority = priority;
 
   if (context)