when installing file system class, pass create = 0 in order to update

file it ti already exists, and add log if this raised an IOError


git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@8793 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5/Document/BusinessTemplate.py

@@ -2378,8 +2378,9 @@ class DocumentTemplateItem(BaseTemplateItem):
           path, name = os.path.split(id)
           # This raises an exception if the file already exists.
           try:
-            globals()[self.local_file_writer_name](name, text, create=1)
+            globals()[self.local_file_writer_name](name, text, create=0)
           except IOError, error:
+            LOG("BusinessTemplate.py", WARNING, "Cannot install class %s on file system" %(name,))
             if error.errno :
               raise
             continue