From b338aa0e71b45d858aeb52d3528ed0c30ae88b1d Mon Sep 17 00:00:00 2001
From: Michael Natterer <mitch@gimp.org>
Date: Sun, 20 Feb 2011 13:16:46 +0100
Subject: [PATCH] app: forgot precondition checks in gimpdisplayshell-grab.c

---
 app/display/gimpdisplayshell-grab.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/app/display/gimpdisplayshell-grab.c b/app/display/gimpdisplayshell-grab.c
index 1320c0a075..a9dc48f4d7 100644
--- a/app/display/gimpdisplayshell-grab.c
+++ b/app/display/gimpdisplayshell-grab.c
@@ -59,6 +59,8 @@ void
 gimp_display_shell_pointer_ungrab (GimpDisplayShell *shell,
                                    GdkEvent         *event)
 {
+  g_return_if_fail (GIMP_IS_DISPLAY_SHELL (shell));
+  g_return_if_fail (event != NULL);
   g_return_if_fail (shell->pointer_grabbed == TRUE);
 
   gdk_display_pointer_ungrab (gtk_widget_get_display (shell->canvas),