[dialog-lot-viewer] g_free a GList* properly

g_list_free requires the argument is the head of a GList. Calling
g_list_reverse makes the filtered_list points to the last
element. Assigning filtered_list to the result of g_list_reverse
ensures it still points to the head, allowing g_list_free to free the
list properly.

gnucash/gnome/dialog-lot-viewer.c

@@ -231,9 +231,10 @@ lv_show_splits_free (GNCLotViewer *lv)
             filtered_list = g_list_prepend (filtered_list, split);
         }
     }
+    filtered_list = g_list_reverse (filtered_list);
 
     /* display list */
-    gnc_split_viewer_fill(lv, lv->split_free_store, g_list_reverse (filtered_list));
+    gnc_split_viewer_fill(lv, lv->split_free_store, filtered_list);
     g_list_free (filtered_list);
 }