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background: don't tank if background is destroyed before it gets a pipeline
Right now we call unset_texture from MetaBackground's dispose method. unset_texture assumes there's a pipeline available, but there may not be if the object was just created. This commit fixes that incorrect assumption. https://bugzilla.gnome.org/show_bug.cgi?id=696157
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@ -704,7 +704,8 @@ static void
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unset_texture (MetaBackground *self)
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{
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MetaBackgroundPrivate *priv = self->priv;
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cogl_pipeline_set_layer_texture (priv->pipeline, 0, NULL);
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if (priv->pipeline != NULL)
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cogl_pipeline_set_layer_texture (priv->pipeline, 0, NULL);
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g_clear_pointer (&priv->texture,
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(GDestroyNotify)
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