Remove useless null check
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@ -117,12 +117,10 @@ export class OrthographicCamera extends Camera {
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this._bounds = glmatrix.vec4.create();
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if (this.canvas != null) {
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this.canvas.addEventListener('wheel', event => this.onWheel(event), false);
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this.canvas.addEventListener('mousedown', event => this.onMouseDown(event), false);
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this.canvas.addEventListener('mouseup', event => this.onMouseUp(event), false);
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this.canvas.addEventListener('mousemove', event => this.onMouseMove(event), false);
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}
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this.canvas.addEventListener('wheel', event => this.onWheel(event), false);
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this.canvas.addEventListener('mousedown', event => this.onMouseDown(event), false);
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this.canvas.addEventListener('mouseup', event => this.onMouseUp(event), false);
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this.canvas.addEventListener('mousemove', event => this.onMouseMove(event), false);
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this.onPan = null;
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this.onZoom = null;
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