Merge pull request #2684 from aternatik/fix_odt_lines_type

Add missing value into ODT for object line type (product or service)

htdocs/core/class/commondocgenerator.class.php

@@ -408,6 +408,7 @@ abstract class CommonDocGenerator
 			'line_fulldesc'=>doc_getlinedesc($line,$outputlangs),
 			'line_product_ref'=>$line->product_ref,
 			'line_product_label'=>$line->product_label,
+                        'line_product_type'=>$line->product_type,
 			'line_desc'=>$line->desc,
 			'line_vatrate'=>vatrate($line->tva_tx,true,$line->info_bits),
 			'line_up'=>price2num($line->subprice),