[gnome-photos/wip/rishi/unit-tests-gegl: 3/4] gegl: Be more strict about what is acceptable

[Debarshi Ray <debarshir src gnome org>]

commit ad8952b2f1178dd887ae159b84cb6dcacbd0bd46
Author: Debarshi Ray <debarshir gnome org>
Date:   Wed Nov 28 19:07:06 2018 +0100

    gegl: Be more strict about what is acceptable

 src/photos-gegl.c | 2 ++
 1 file changed, 2 insertions(+)
---
diff --git a/src/photos-gegl.c b/src/photos-gegl.c
index 88a1092c..171d1a76 100644
--- a/src/photos-gegl.c
+++ b/src/photos-gegl.c
@@ -389,6 +389,8 @@ photos_gegl_buffer_new_from_pixbuf (GdkPixbuf *pixbuf)
   gint width;
   const guint8 *pixels;
 
+  g_return_val_if_fail (GDK_IS_PIXBUF (pixbuf), NULL);
+
   height = gdk_pixbuf_get_height (pixbuf);
   width = gdk_pixbuf_get_width (pixbuf);
   gegl_rectangle_set (&bbox, 0, 0, (guint) width, (guint) height);