Traceback when displaying an alert when the display screen is closed

[Andreas Preikschat]

Hello,

windows xp, build 1787

1) Make sure the live display is closed. You can send a song live (does not matter), but you need to close it with ESC.
2) Press F7 to display an alert.
3) Send the alert.

However, the alert is still displayed.

Result:
Traceback (most recent call last):
  File "D:\OpenLP_Code\trunk\build\pyi.win32\OpenLP\outPYZ1.pyz\openlp.plugins.alerts.forms.alertform", line 84, in onDisplayClicked
  File "D:\OpenLP_Code\trunk\build\pyi.win32\OpenLP\outPYZ1.pyz\openlp.plugins.alerts.forms.alertform", line 198, in triggerAlert
  File "D:\OpenLP_Code\trunk\build\pyi.win32\OpenLP\outPYZ1.pyz\openlp.plugins.alerts.lib.alertsmanager", line 77, in displayAlert
  File "D:\OpenLP_Code\trunk\build\pyi.win32\OpenLP\outPYZ1.pyz\openlp.plugins.alerts.lib.alertsmanager", line 88, in generateAlert
  File "D:\OpenLP_Code\trunk\build\pyi.win32\OpenLP\outPYZ1.pyz\openlp.core.ui.maindisplay", line 244, in alert
AttributeError: 'MainDisplay' object has no attribute 'alertTab'