[evolution] EShell: Check cookie before calling gtk_application_uninhibit().

[Matthew Barnes <mbarnes src gnome org>]

commit afdbd662d1586a83982d63b355c3852ff47be651
Author: Matthew Barnes <mbarnes redhat com>
Date:   Fri May 31 10:31:31 2013 -0400

    EShell: Check cookie before calling gtk_application_uninhibit().

 shell/e-shell.c |    9 ++++++++-
 1 files changed, 8 insertions(+), 1 deletions(-)
---
diff --git a/shell/e-shell.c b/shell/e-shell.c
index 40a771c..3ca64df 100644
--- a/shell/e-shell.c
+++ b/shell/e-shell.c
@@ -371,7 +371,14 @@ shell_ready_for_quit (EShell *shell,
        /* Finalize the activity. */
        g_object_unref (activity);
 
-       gtk_application_uninhibit (application, shell->priv->inhibit_cookie);
+       /* XXX Inhibiting session manager actions currently only
+        *     works on GNOME, so check that we obtained a valid
+        *     inhibit cookie before attempting to uninhibit. */
+       if (shell->priv->inhibit_cookie > 0) {
+               gtk_application_uninhibit (
+                       application, shell->priv->inhibit_cookie);
+               shell->priv->inhibit_cookie = 0;
+       }
 
        /* Destroy all watched windows.  Note, we iterate over a -copy-
         * of the watched windows list because the act of destroying a