[gtk+] Don't decrement the init_ref_count towards -infinity

[Matthias Clasen <matthiasc src gnome org>]

commit 93e5d83a9da46a2c9a3b95a7a6f1296ecd49fdc9
Author: Matthias Clasen <mclasen redhat com>
Date:   Tue Mar 26 21:27:21 2013 -0400

    Don't decrement the init_ref_count towards -infinity
    
    Once we are at zero, initialization is done.

 gdk/wayland/gdkscreen-wayland.c |    6 ++++--
 1 files changed, 4 insertions(+), 2 deletions(-)
---
diff --git a/gdk/wayland/gdkscreen-wayland.c b/gdk/wayland/gdkscreen-wayland.c
index 5d17688..1acc81a 100644
--- a/gdk/wayland/gdkscreen-wayland.c
+++ b/gdk/wayland/gdkscreen-wayland.c
@@ -872,8 +872,10 @@ output_handle_geometry(void *data,
   monitor->output_name = g_strdup (model);
 
   /* Once we have the geometry event we know we have all events
-   * from the wl_output and need no further init roundtrips. */
-  display->init_ref_count--;
+   * from the wl_output and need no further init roundtrips.
+   */
+  if (display->init_ref_count > 0)
+    display->init_ref_count--;
 }
 
 static void