Bug#461625: yelp: segfault while loading info documentation

[Steve Kemp]

  The patch below my sig fixes this.  Still get assertion failures,
 but no more segfault, and the file displays as expected.

Steve
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--- ./yelp-info-parser.c-orig   2008-03-20 19:45:43.000000000 +0000
+++ yelp-info-parser.c  2008-03-20 19:52:56.000000000 +0000
@@ -349,10 +349,12 @@
   tmp = gtk_tree_iter_copy (it);

   reftitle = gtk_tree_model_get_string_from_iter (model, comp);
+  if (!reftitle)
+    return NULL;

   result = gtk_tree_model_iter_parent (model, r, it);
-  if (!result)
-    return it;
+  if ((!result) || (!model))
+    return NULL;

   title = gtk_tree_model_get_string_from_iter (model, r);

@@ -364,8 +366,7 @@