fat16_read_internal may read out of bounds

[RyanStan]

/* 
 * TODO: If offset is partially into the cluster already,
 * then n does not necessarily have to be larger than cluster_size_bytes for the read to overrun into the next cluster.
 * This code incorrectly assumes that we're starting a read from the beginning of a cluster.
 */
        int bytes_to_read = n > cluster_size_bytes ? cluster_size_bytes : n;

In fat16_read_internal in fat16.c.