fix for arm, where char by default is unsigned

[Jojo-Schmitz]

See https://musescore.org/en/node/73701

[lasconic]

is that tested?

[Jojo-Schmitz]

Not on arm, not by me, it is just obviously correct ;-)
I'm quite puzzled that other platforms like Mac or Linux don't complain about this?

[ericfont]

I will try to test in the next week or so...will likely be more bugs when try to compile for arch linux arm. But I do have at least one of each armv5, armv6, armv7 to test on.

[ericfont]

My suspicion is that since the official archlinuxarm build failed 20% the way through, there will likely be some more compiler errors during the rest. Probably will be even more of the signed issues.

[lasconic]

As far as I know, it runs on debian arm. See at the bottom here https://packages.debian.org/sid/musescore

[ericfont]

it is possible that because arch linux always uses the latest stuff version, that the newer compiler complains, while older ones used by debian don't complain. So they issue might affect debian later. Or it could be a build script issue.

Anyway, these data types should always be the most unambiguous for maximum portability.