@param s Pointer to the tag data, as returned by bam_aux_get(). @return The length of the array, or 0 if the tag is not an array type. If the tag is not an array type, errno is set to EINVAL.
See Implementation
@param s Pointer to the tag data, as returned by bam_aux_get(). @return The length of the array, or 0 if the tag is not an array type. If the tag is not an array type, errno is set to EINVAL.