atspi_accessible_clear_cache: don't crash if we have no children

If an accessible is disposed, then its list of children may be NULL.

https://bugzilla.gnome.org/show_bug.cgi?id=767075

diff --git a/atspi/atspi-accessible.c b/atspi/atspi-accessible.c
index ceaedb5..4547ef7 100644 (file)
--- a/atspi/atspi-accessible.c
+++ b/atspi/atspi-accessible.c
@@ -1634,8 +1634,9 @@ atspi_accessible_clear_cache (AtspiAccessible *obj)
   if (obj)
   {
     obj->cached_properties = ATSPI_CACHE_NONE;
-    for (i = 0; i < obj->children->len; i++)
-      atspi_accessible_clear_cache (g_ptr_array_index (obj->children, i));
+    if (obj->children)
+      for (i = 0; i < obj->children->len; i++)
+        atspi_accessible_clear_cache (g_ptr_array_index (obj->children, i));
   }
 }