[FS#764] MT6721: Any traffic shaping results in crashes/stack traces

[LEDE Bugs]

The following task has a new comment added:

FS#764 - MT6721: Any traffic shaping results in crashes/stack traces
User who did this - Jaap Buurman (Mushoz)

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This commit supposedly fixes this longstanding issue:

https://git.lede-project.org/?p=lede/blogic/staging.git;a=commit;h=c05efda56aecea0f0f52a000a3ce271775b5fb24

I will personally test this commit this weekend. For people that have time earlier, feel free to test this :)
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More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=764#comment2870