Fix panic in drag entered (#10277)

Co-Authored-By: Kirill <kirill@zed.dev>

Release Notes:

- Fixed panic when dragging into Zed.

Optionally, include screenshots / media showcasing your addition that
can be included in the release notes.

**or**

- N/A

Co-authored-by: Kirill <kirill@zed.dev>
9b88259b1fConrad Irwin committed on 4/8/2024, 5:18:10 PM· committed by GitHubparent4d68bf2
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