Bug fix: check existence of layer before scrolling into it

adobe-photoshop / spaces-design

Adobe Photoshop Design Space

http://adobe-photoshop.github.io/

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Closed shaoshing closed 8 years ago

shaoshing commented 8 years ago

This PR checks if the current document has selected layers before scrolling into it at initial display. This will fix for issue #3764

shaoshing commented 8 years ago

@iwehrman I've made the null ref more clear now. Please review again.

iwehrman commented 8 years ago

Better!