[FIX] l10n_be_intrastat: skip EXTXVAL=0

An entry with EXTXVAL=0 should not be included in the Intrastat
declaration, otherwise it is rejected.

opw-686201

addons/l10n_be_intrastat/wizard/xml_decl.py

@@ -342,8 +342,10 @@ class xml_decl(osv.TransientModel):
 
         numlgn = 0
         for linekey in entries:
-            numlgn += 1
             amounts = entries[linekey]
+            if round(amounts[0], 0) == 0:
+                continue
+            numlgn += 1
             item = ET.SubElement(datas, 'Item')
             self._set_Dim(item, 'EXSEQCODE', unicode(numlgn))
             self._set_Dim(item, 'EXTRF', unicode(linekey.EXTRF))