Fix: Lost pagecode after csv export

htdocs/exports/class/export.class.php

@@ -217,7 +217,7 @@ class Export
 		// Build the sql request
 		$sql=$this->array_export_sql_start[$indice];
 		$i=0;
-		
+
 		//print_r($array_selected);
 		foreach ($this->array_export_fields[$indice] as $key => $value)
 		{
@@ -254,14 +254,14 @@ class Export
 		asort($array_selected);
 
 		dol_syslog("Export::build_file $model, $datatoexport, $array_selected");
-		
+
 		// Check parameters or context properties
 		if (! is_array($this->array_export_fields[$indice]))
 		{
 			$this->error="ErrorBadParameter";
 			return -1;
 		}
-		
+
 		// Creation de la classe d'export du model ExportXXX
 		$dir = DOL_DOCUMENT_ROOT . "/core/modules/export/";
 		$file = "export_".$model.".modules.php";
@@ -283,7 +283,7 @@ class Export
 			$filename.='.'.$objmodel->getDriverExtension();
 			$dirname=$conf->export->dir_temp.'/'.$user->id;
 
-			$outputlangs=$langs;	// Lang for output
+			$outputlangs=dol_clone($langs);	// We clone to have an object we can modify (for example to change output charset by csv handler) without changing original value
 
 			// Open file
 			dol_mkdir($dirname);
@@ -333,7 +333,8 @@ class Export
 
 				// Close file
 				$objmodel->close_file();
-				return 1;
+
+        		return 1;
 			}
 			else
 			{