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diff --git a/src/unicapgtk_property_dialog.c b/src/unicapgtk_property_dialog.c
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index 0adf8a1..83288ef 100644
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--- a/src/unicapgtk_property_dialog.c
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+++ b/src/unicapgtk_property_dialog.c
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@@ -308,7 +308,7 @@ static gboolean property_update_timeout_cb( UnicapgtkPropertyDialog *ugtk )
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 static void update_lock_destroy_cb( gpointer _id )
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 {
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-   guint id = ( guint ) id;
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+   guint id = ( guint ) _id;
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    if( id )
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    {