st_widget_get_theme_node: g_error if called on an unparented widget
It's wrong to do anything that requires looking up a widget's style before you add the widget to the stage, since its final style may depend on properties inherited from its parents. st_widget_get_theme_node() used to emit a warning in this case, but many would-be contributors apparently didn't notice. Help them out. https://bugzilla.gnome.org/show_bug.cgi?id=610279
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@ -1101,8 +1101,7 @@ st_widget_get_theme_node (StWidget *widget)
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if (stage == NULL)
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{
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g_warning ("st_widget_get_theme_node called on a widget not in a stage");
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stage = CLUTTER_STAGE (clutter_stage_get_default ());
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g_error ("st_widget_get_theme_node called on a widget not in a stage");
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}
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if (parent_node == NULL)
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