[cfe-commits] [Patch] Make -Wformat accept printf("%hhx", c); with -funsigned-char (PR12761)

[Hans Wennborg]

Hi all,

For "%hhx", printf expects an unsigned char. This patch makes Clang
accept a 'char' argument for that when using -funsigned-char.

(Also removing some trailing whitespace and adding a few curly braces
while we're here.)

Please let me know if this is OK to commit.

Thanks,
Hans
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