[glib] Fix up some harmless FALSE <> NULL confusions

[Matthias Clasen <matthiasc src gnome org>]

commit 122a53a9bc546e4705d20b15c703b8ba354e967b
Author: Matthias Clasen <mclasen redhat com>
Date:   Tue Apr 26 22:51:54 2011 -0400

    Fix up some harmless FALSE <> NULL confusions
    
    Reported in bug 643134.

 gio/gdbusconnection.c |    2 +-
 gio/gdbusmessage.c    |    7 +++----
 2 files changed, 4 insertions(+), 5 deletions(-)
---
diff --git a/gio/gdbusconnection.c b/gio/gdbusconnection.c
index 999cb80..6b96ea1 100644
--- a/gio/gdbusconnection.c
+++ b/gio/gdbusconnection.c
@@ -1992,7 +1992,7 @@ g_dbus_connection_send_message_with_reply_sync (GDBusConnection   *connection,
 
   g_return_val_if_fail (G_IS_DBUS_CONNECTION (connection), NULL);
   g_return_val_if_fail (G_IS_DBUS_MESSAGE (message), NULL);
-  g_return_val_if_fail ((flags & G_DBUS_SEND_MESSAGE_FLAGS_PRESERVE_SERIAL) || !g_dbus_message_get_locked (message), FALSE);
+  g_return_val_if_fail ((flags & G_DBUS_SEND_MESSAGE_FLAGS_PRESERVE_SERIAL) || !g_dbus_message_get_locked (message), NULL);
   g_return_val_if_fail (timeout_msec >= 0 || timeout_msec == -1, NULL);
   g_return_val_if_fail (error == NULL || *error == NULL, NULL);
 
diff --git a/gio/gdbusmessage.c b/gio/gdbusmessage.c
index 94a1de3..5fc67e7 100644
--- a/gio/gdbusmessage.c
+++ b/gio/gdbusmessage.c
@@ -3197,8 +3197,8 @@ g_dbus_message_lock (GDBusMessage *message)
  * This operation can fail if e.g. @message contains file descriptors
  * and the per-process or system-wide open files limit is reached.
  *
- * Returns: (transfer full): A new #GDBusMessage or %NULL if @error is set. Free with
- * g_object_unref().
+ * Returns: (transfer full): A new #GDBusMessage or %NULL if @error is set.
+ *     Free with g_object_unref().
  *
  * Since: 2.26
  */
@@ -3212,7 +3212,7 @@ g_dbus_message_copy (GDBusMessage  *message,
   GVariant *header_value;
 
   g_return_val_if_fail (G_IS_DBUS_MESSAGE (message), NULL);
-  g_return_val_if_fail (error == NULL || *error == NULL, FALSE);
+  g_return_val_if_fail (error == NULL || *error == NULL, NULL);
 
   ret = g_dbus_message_new ();
   ret->type                   = message->type;
@@ -3255,4 +3255,3 @@ g_dbus_message_copy (GDBusMessage  *message,
  out:
   return ret;
 }
-