84fe76cad4
Compiling the Arduino targets with GCC 12 fails with the following:
error: array subscript 0 is outside array bounds of 'volatile uint8_t[0]' {aka 'volatile unsigned char[]'} [-Werror=array-bounds]
Apply the workaround from the bug discussion to fix it.
Ref: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105523
Signed-off-by: Tim Crawford <tcrawford@system76.com>