[MRG] [FIX] don't include adjacent bom's products into check for recu…

…rsion (closes lp:1155569)

https://launchpad.net/bugs/1155569

addons/mrp/mrp.py

@@ -247,19 +247,17 @@ def _check_recursion(self, cr, uid, ids, context=None):
         return True
 
     def _check_product(self, cr, uid, ids, context=None):
-        all_prod = []
         boms = self.browse(cr, uid, ids, context=context)
-        def check_bom(boms):
+        def check_bom(boms, all_prod):
             res = True
             for bom in boms:
                 if bom.product_id.id in all_prod:
-                    res = res and False
-                all_prod.append(bom.product_id.id)
+                    return False
                 lines = bom.bom_lines
                 if lines:
-                    res = res and check_bom([bom_id for bom_id in lines if bom_id not in boms])
+                    res = res and check_bom([bom_id for bom_id in lines if bom_id not in boms], all_prod + [bom.product_id.id])
             return res
-        return check_bom(boms)
+        return check_bom(boms, [])
 
     _constraints = [
         (_check_recursion, 'Error ! You cannot create recursive BoM.', ['parent_id']),