Merge tag 'dirtylimit-dirtyrate-pull-request-20240617' of https://github.com/newfriday/qemu into staging

dirtylimit-dirtyrate-pull-request-20240617: Fix a segmentation fault

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# Primary key fingerprint: 685D 0220 DC26 4828 152E  57C2 DFF2 23D6 B3FE CB9C

* tag 'dirtylimit-dirtyrate-pull-request-20240617' of https://github.com/newfriday/qemu:
  migration/dirtyrate: Fix segmentation fault

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>