On ARM, gcc warns (-Werror=type-limits) that it will always be false
for the if statement. This is because here s->aid is defined as char,
while proxmox_restore_open_image() returns an int.
This is probably because chars are treated as unsigned on arm arch but
signed on x86 arch:
https://developer.arm.com/documentation/den0013/d/Porting/Miscellaneous-C-porting-issues/unsigned-char-and-signed-char
Make aid an explicit uint8_t, because that is the type for functions
taking the aid as a parameter, e.g. proxmox_restore_get_image_length().
Signed-off-by: Jing Luo <jing@jing.rocks>
[FE: slightly improve commit message]
Signed-off-by: Fiona Ebner <f.ebner@proxmox.com>
51df4937bf
