make dispose not fail
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1 changed files with 2 additions and 1 deletions
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@ -20,6 +20,7 @@ export class JoinedMap extends BaseObservableMap {
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constructor(sources) {
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super();
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this._sources = sources;
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this._subscriptions = null;
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}
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onAdd(source, key, value) {
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@ -160,7 +161,7 @@ class SourceSubscriptionHandler {
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}
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subscribe() {
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this._source.subscribe(this);
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this._subscription = this._source.subscribe(this);
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return this;
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}
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