db_prefs: return null if requested key is unset
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@ -93,6 +93,8 @@ class Db_Prefs {
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} else if ($die_on_error) {
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user_error("Fatal error, unknown preferences key: $pref_name (owner: $user_id)", E_USER_ERROR);
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return null;
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} else {
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return null;
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}
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}
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