fixing warnings during restore
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@@ -434,7 +434,7 @@ class question_multichoice_qtype extends default_questiontype {
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$multichoice->layout = backup_todb($mul_info['#']['LAYOUT']['0']['#']);
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$multichoice->answers = backup_todb($mul_info['#']['ANSWERS']['0']['#']);
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$multichoice->single = backup_todb($mul_info['#']['SINGLE']['0']['#']);
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$multichoice->shuffleanswers = backup_todb($mul_info['#']['SHUFFLEANSWERS']['0']['#']);
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$multichoice->shuffleanswers = isset($mul_info['#']['SHUFFLEANSWERS']['0']['#'])?backup_todb($mul_info['#']['SHUFFLEANSWERS']['0']['#']):'';
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if (array_key_exists("CORRECTFEEDBACK", $mul_info['#'])) {
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$multichoice->correctfeedback = backup_todb($mul_info['#']['CORRECTFEEDBACK']['0']['#']);
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} else {
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