Raise the real error.

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@27051 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5Wizard/Tool/WizardTool.py

@@ -536,7 +536,11 @@ class WizardTool(BaseTool):
 
     portal = self.getPortalObject()
     bt5_files = server_response.get("filedata", [])
-    bt5_filenames = server_response["server_buffer"].get("filenames", [])
+    server_buffer = server_response.get("server_buffer", None)
+    if server_buffer is None:
+      # server doesn't comform protocol which means a possible server error 
+      raise "Witch server configuration error."
+    bt5_filenames = server_buffer.get("filenames", [])
     portal_templates = getToolByName(portal, 'portal_templates')
     counter = 0
     LOG("Wizard", INFO,