[balsa] mailbox-node: Use parent-class set by macro

[Peter Bloomfield <peterb src gnome org>]

commit eb53a71c153951c719184bef92e729acd4c68aa2
Author: Peter Bloomfield <PeterBloomfield bellsouth net>
Date:   Mon Jul 29 15:56:29 2019 -0400

    mailbox-node: Use parent-class set by macro
    
    Use parent-class set by G_DEFINE_TYPE instead of our own
    variable
    
    * src/mailbox-node.c (balsa_mailbox_node_class_init),
      (balsa_mailbox_node_dispose), (balsa_mailbox_node_finalize):

 ChangeLog          | 8 ++++++++
 src/mailbox-node.c | 7 ++-----
 2 files changed, 10 insertions(+), 5 deletions(-)
---
diff --git a/ChangeLog b/ChangeLog
index a2ba653dd..272579f77 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,11 @@
+2019-07-29  Peter Bloomfield  <pbloomfield bellsouth net>
+
+       Use parent-class set by G_DEFINE_TYPE instead of our own
+       variable
+
+       * src/mailbox-node.c (balsa_mailbox_node_class_init),
+       (balsa_mailbox_node_dispose), (balsa_mailbox_node_finalize):
+
 2019-07-29  Peter Bloomfield  <pbloomfield bellsouth net>
 
        rfc2445: Use GDateTime instead of GTimeVal, which is deprecated
diff --git a/src/mailbox-node.c b/src/mailbox-node.c
index 56ecd3fbf..01309321c 100644
--- a/src/mailbox-node.c
+++ b/src/mailbox-node.c
@@ -41,7 +41,6 @@
    Folders can additionally scan associated directory or IMAP server to
    retrieve their tree of mailboxes.
 */
-static GObjectClass *parent_class = NULL;
 
 typedef struct imap_scan_item_ imap_scan_item;
 struct imap_scan_item_ {
@@ -116,8 +115,6 @@ balsa_mailbox_node_class_init(BalsaMailboxNodeClass * klass)
 {
     GObjectClass *object_class;
 
-    parent_class = g_type_class_peek_parent(klass);
-
     object_class = G_OBJECT_CLASS(klass);
 
     balsa_mailbox_node_signals[SAVE_CONFIG] =
@@ -187,7 +184,7 @@ balsa_mailbox_node_dispose(GObject * object)
        mn->mailbox = NULL;
     }
 
-    G_OBJECT_CLASS(parent_class)->dispose(object);
+    G_OBJECT_CLASS(balsa_mailbox_node_parent_class)->dispose(object);
 }
 
 static void
@@ -210,7 +207,7 @@ balsa_mailbox_node_finalize(GObject * object)
        mn->server = NULL;
     }
 
-    G_OBJECT_CLASS(parent_class)->finalize(G_OBJECT(object));
+    G_OBJECT_CLASS(balsa_mailbox_node_parent_class)->finalize(G_OBJECT(object));
 }
 
 static void