base_panel: Fix issue with nonetype error
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@ -156,7 +156,7 @@ class BasePanel(ScreenPanel):
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return self.layout
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def process_update(self, action, data):
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if action != "notify_status_update":
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if action != "notify_status_update" or self._printer == None:
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return
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if self._printer.has_heated_bed():
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