[Bug target/66547] arm-none-eabi-gcc - stack misaligned when calling va_arg function

[matt at hpamotorsport dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66547

--- Comment #3 from Matthew Peters <matt at hpamotorsport dot com> ---
Thanks for looking into that; you are correct.

And I feel rather stupid as, when testing to double-check your assessment, I
found that the stack was not aligned before the function starts.