Do not blindly rely that server will obey specification and always return this.

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@26356 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5Wizard/Tool/WizardTool.py

@@ -789,9 +789,10 @@ class WizardTool(BaseTool):
     server_url = self.getServerUrl() + self.getServerRoot()
     server_response = self._callRemoteMethod('getBT5FilesForBusinessConfiguration', server_url)
     ## save erp5_uid which will make it possible to distingush different business conf for client
-    current_bc_index = server_response['server_buffer'].get('current_bc_index', None)
-    if current_bc_index is not None:
-      self._setServerInfo(current_bc_index = current_bc_index)
+    if server_response.get('server_buffer', None) is not None:
+      current_bc_index = server_response['server_buffer'].get('current_bc_index', None)
+      if current_bc_index is not None:
+        self._setServerInfo(current_bc_index = current_bc_index)
     self.installBT5FilesFromServer(server_response, True)
     server_response = self._callRemoteMethod('finalizeInstallation', server_url)
     LOG("Wizard", INFO,