[gtk/matthiasc/for-master: 4/6] sizerequest: Avoid a corner case

[Matthias Clasen <matthiasc src gnome org>]

commit 8b82993dde5bea985dac69e5ff940236db11f83b
Author: Matthias Clasen <mclasen redhat com>
Date:   Wed Mar 17 07:50:24 2021 -0400

    sizerequest: Avoid a corner case
    
    gcc 11 warns that the code isn't safe when
    n_requested_sizes is 0. Add a precondition check
    to make it clear that that never happens.

 gtk/gtksizerequest.c | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/gtk/gtksizerequest.c b/gtk/gtksizerequest.c
index a8d4ff7763..bad631c022 100644
--- a/gtk/gtksizerequest.c
+++ b/gtk/gtksizerequest.c
@@ -698,6 +698,7 @@ gtk_distribute_natural_allocation (int               extra_space,
   int    i;
 
   g_return_val_if_fail (extra_space >= 0, 0);
+  g_return_val_if_fail (n_requested_sizes > 0, 0);
 
   spreading = g_newa (guint, n_requested_sizes);