[Bug 39200] Avoid using a NULL hash table

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=39200

--- Comment #1 from Olivier Crête <olivier.crete at ocrete.ca> 2011-07-13 12:43:29 PDT ---
@@ -231,6 +231,30 @@ tf_call_channel_dispose (GObject *object)
...
+      while (g_hash_table_iter_next (&iter, &key, &value))
+        {
+          TfCallContent *content = TF_CALL_CONTENT (value);
+          if (content)
+            tf_call_content_on_call_channel_gone (content);

Why do you have a if (content) here? In which case could the value be NULL ?

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