From f41012080fa79c408d0277f7b68d4b2fe14dd69c Mon Sep 17 00:00:00 2001
From: Emmanuele Bassi <ebassi@gnome.org>
Date: Tue, 26 Jan 2021 12:56:32 +0000
Subject: [PATCH] Validate arguments

We're just assuming everything is not NULL or with a valid type.
---
 gdk/gdksurface.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/gdk/gdksurface.c b/gdk/gdksurface.c
index aaeb6d21b4..31c5b44b73 100644
--- a/gdk/gdksurface.c
+++ b/gdk/gdksurface.c
@@ -2984,6 +2984,11 @@ gdk_surface_translate_coordinates (GdkSurface *from,
   int x1, y1, x2, y2;
   GdkSurface *f, *t;
 
+  g_return_val_if_fail (GDK_IS_SURFACE (from), FALSE);
+  g_return_val_if_fail (GDK_IS_SURFACE (to), FALSE);
+  g_return_val_if_fail (x != NULL, FALSE);
+  g_return_val_if_fail (y != NULL, FALSE);
+
   in_x = *x;
   in_y = *y;