[eog] EogWindow: Fix critical warning when switching between fullscreen modes

[Felix Riemann <friemann src gnome org>]

commit 69a80edd4db7a9adf796e8019a7a70e55230c30b
Author: Felix Riemann <friemann gnome org>
Date:   Tue Dec 23 17:52:55 2014 +0100

    EogWindow: Fix critical warning when switching between fullscreen modes

 src/eog-window.c |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)
---
diff --git a/src/eog-window.c b/src/eog-window.c
index 5eb89f2..28a0275 100644
--- a/src/eog-window.c
+++ b/src/eog-window.c
@@ -2018,7 +2018,9 @@ eog_window_inhibit_screensaver (EogWindow *window)
 {
        EogWindowPrivate *priv = window->priv;
 
-       g_return_if_fail (priv->fullscreen_idle_inhibit_cookie == 0);
+       /* Already inhibited */
+       if (G_UNLIKELY (priv->fullscreen_idle_inhibit_cookie != 0))
+               return;
 
        eog_debug (DEBUG_WINDOW);