Try to guess the portal if it is not passed as parameter

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@24351 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5/Tool/ContributionTool.py

@@ -243,7 +243,9 @@ class ContributionTool(BaseTool):
         extension = '.%s' % file_name.split('.')[-1]
       file_name = '%s%s' % (self.generateNewId(), extension)
 
-    portal_type = self._guessPortalType(file_name, mime_type, data)
+    # Try to guess the portal if it is not passed as parameter
+    if portal_type is None:
+      portal_type = self._guessPortalType(file_name, mime_type, data)
 
     # Then put the file inside ourselves for a short while
     if container_path is not None: