It contains only lines with pointers to characters (u32s). So use
simple clear 'u32 **lines' all over the code.

This avoids zero-length arrays. It also makes the allocation less
error-prone (size of the struct wasn't taken into account at all).
Signed-off-by: NJiri Slaby (SUSE) <jirislaby@kernel.org>
Reviewed-by: NIlpo Järvinen <ilpo.jarvinen@linux.intel.com>
Link: https://lore.kernel.org/r/20230112080136.4929-6-jirislaby@kernel.orgSigned-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>