check keydown event characters length on macos#23390
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asmorkalov merged 1 commit intoopencv:3.4from Apr 2, 2023
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VadimLevin
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LGTM
From NSEvent characters property reference
This property is set to an empty string for dead keys, such as Option-e.
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Fixes #21401
Check keydown event characters length before returning the pressed character code
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