[gtk/wip/baedert/for-master: 174/180] gdksurface: Ensure some assumptions

[Timm Bäder <baedert src gnome org>]

commit eb1e6700e706c0af0e40212c1bdcc1feb861c05d
Author: Timm Bäder <mail baedert org>
Date:   Thu Oct 15 18:51:51 2020 +0200

    gdksurface: Ensure some assumptions
    
    Just to please scan-build

 gdk/gdksurface.c | 3 +++
 1 file changed, 3 insertions(+)
---
diff --git a/gdk/gdksurface.c b/gdk/gdksurface.c
index 4b485a012d..c32c17262b 100644
--- a/gdk/gdksurface.c
+++ b/gdk/gdksurface.c
@@ -2051,6 +2051,9 @@ update_cursor (GdkDisplay *display,
   GdkDeviceGrabInfo *grab;
   GdkCursor *cursor;
 
+  g_assert (display);
+  g_assert (device);
+
   pointer_info = _gdk_display_get_pointer_info (display, device);
   pointer_surface = pointer_info->surface_under_pointer;