fix test of method exist on wrong object
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@ -1937,7 +1937,7 @@ function pdf_getlineprogress($object, $i, $outputlangs, $hidedetails = 0, $hookm
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if ($conf->global->SITUATION_DISPLAY_DIFF_ON_PDF)
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{
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$prev_progress = 0;
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if (method_exists($object, 'get_prev_progress'))
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if (method_exists($object->lines[$i], 'get_prev_progress'))
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{
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$prev_progress = $object->lines[$i]->get_prev_progress($object->id);
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}
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