[rhythmbox] source: protect against repeated deletion (bug #613526)

[Jonathan Matthew <jmatthew src gnome org>]

commit b6fa4439d5b1e0a14d34bf5af09adf5e894208ca
Author: Jonathan Matthew <jonathan d14n org>
Date:   Wed May 19 18:39:10 2010 +1000

    source: protect against repeated deletion (bug #613526)
    
    Some devices appear and disappear when plugged in, which causes the
    corresponding source to be deleted twice - once when the device
    disappears and once when the device open operation fails.  The easy way
    to fix this is just to check that a source hasn't already been deleted
    when deleting it.

 sources/rb-source.c |   10 ++++++++++
 1 files changed, 10 insertions(+), 0 deletions(-)
---
diff --git a/sources/rb-source.c b/sources/rb-source.c
index 0e174e1..8bbc6d6 100644
--- a/sources/rb-source.c
+++ b/sources/rb-source.c
@@ -123,6 +123,8 @@ struct _RBSourcePrivate
 	RBSourceGroup *source_group;
 	RBPlugin *plugin;
 	RBSourceSearchType search_type;
+
+	gboolean deleted;
 };
 
 enum
@@ -1523,8 +1525,16 @@ void
 rb_source_delete_thyself (RBSource *source)
 {
 	RBSourceClass *klass;
+	RBSourcePrivate *priv;
 
 	g_return_if_fail (source != NULL);
+	priv = RB_SOURCE_GET_PRIVATE (source);
+	if (priv->deleted) {
+		rb_debug ("source has already been deleted");
+		return;
+	}
+	priv->deleted = TRUE;
+
 	klass = RB_SOURCE_GET_CLASS (source);
 	klass->impl_delete_thyself (source);
 	g_signal_emit (G_OBJECT (source), rb_source_signals[DELETED], 0);