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Bug 319009 - Check tree, tree.view and tree.view.selection exist before trying to use them.
ChatZilla only. r=samuel
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@ -1452,7 +1452,7 @@ function getSelectedNicknames(tree)
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function setSelectedNicknames(tree, nicknameAry)
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{
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if (!nicknameAry)
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if (!tree || !tree.view || !tree.view.selection || !nicknameAry)
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return;
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var item, unicodeName, resultAry = [];
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// Clear selection:
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