This attribute is used to signal to the compiler
that an array object initialized via a string literal
is not a real string and may lack the space for
the trailing zero, as in char fourcc[4]="FOUR".
This is in preparation for enabling
the -Wunterminated-string-initialization warning.
Reviewed-by: J. Dekker <jdek@itanimul.li>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>