shell-util: ensure we've a valid n_captures when capturing images

https://bugzilla.gnome.org/show_bug.cgi?id=765011
2017-06-08 20:16:04 +08:00 · 2017-06-08 20:16:04 +08:00 · 4c2fd513f4
commit 4c2fd513f4
parent b099e9a69c
1 changed files with 2 additions and 0 deletions
--- a/src/shell-util.c
+++ b/src/shell-util.c
@ -461,6 +461,8 @@ shell_util_composite_capture_images (ClutterCapture  *captures,
  cairo_surface_t *image;
  cairo_t *cr;

+  g_assert (n_captures > 0);
+
  target_scale = 0.0;
  for (i = 0; i < n_captures; i++)
    {