Fix: for avoid sql errors with predefined export models

htdocs/exports/class/export.class.php

@@ -227,12 +227,13 @@ class Export
 		$sql.=$this->array_export_sql_end[$indice];
 
 		//construction du filtrage si le parametrage existe
-		if (is_array($array_filterValue))
+		if (is_array($array_filterValue) && !empty($array_filterValue))
 		{
 			$sqlWhere='';
 			// pour ne pas a gerer le nombre de condition
 			foreach ($array_filterValue as $key => $value)
 			{
+				if (!empty($value))
 					$sqlWhere.=" and ".$this->build_filterQuery($this->array_export_TypeFields[0][$key], $key, $array_filterValue[$key]);
 			}
 			$sql.=$sqlWhere;