[pango/line-breaker: 1/2] layout: Fix an oversight

[Matthias Clasen <matthiasc src gnome org>]

commit cb699f4966eb8c8eaac886fa8b35f531ddf4b257
Author: Matthias Clasen <mclasen redhat com>
Date:   Tue Jan 25 21:21:14 2022 -0500

    layout: Fix an oversight

 pango/pango-layout.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
---
diff --git a/pango/pango-layout.c b/pango/pango-layout.c
index e6587c0f..0214997e 100644
--- a/pango/pango-layout.c
+++ b/pango/pango-layout.c
@@ -1256,7 +1256,8 @@ pango_layout_set_tabs (PangoLayout   *layout,
     return;
 
   g_clear_pointer (&layout->tabs, pango_tab_array_free);
-  layout->tabs = pango_tab_array_copy (tabs);
+  if (tabs)
+    layout->tabs = pango_tab_array_copy (tabs);
 
   g_object_notify_by_pspec (G_OBJECT (layout), props[PROP_TABS]);
   layout_changed (layout);