Fixed crash when scrolling up really fast. #4621
Merged
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Description
This fixes a crash that happens if you happen to scroll up really fast in a fast chat like tmiloadtesting2. The scrollbar would want to be out of bounds, the message snapshot would be indexed out of bounds and Chatterino would segfault.
Old behavior:
https://github.com/Chatterino/chatterino2/assets/25011746/19580242-0c5d-4450-b062-ec1a32340d23
New one does not crash :).