flowbox: Fix get_child_at_index crash with an invalid index

https://bugzilla.gnome.org/show_bug.cgi?id=775525

diff --git a/gtk/gtkflowbox.c b/gtk/gtkflowbox.c
index 38a528b6321b935f16a0f47a30bfaeb1f733b37e..66535af4e13ed776b125fc2afaefe4b0d4217bb4 100644 (file)
--- a/gtk/gtkflowbox.c
+++ b/gtk/gtkflowbox.c
@@ -4272,7 +4272,7 @@ gtk_flow_box_get_child_at_index (GtkFlowBox *box,
   g_return_val_if_fail (GTK_IS_FLOW_BOX (box), NULL);
 
   iter = g_sequence_get_iter_at_pos (BOX_PRIV (box)->children, idx);
-  if (iter)
+  if (!g_sequence_iter_is_end (iter))
     return g_sequence_get (iter);
 
   return NULL;