stop assuming 512 byte blocksize, use LIB header size to determine it as per OMF spec.
stop assuming 512 byte blocksize, use LIB header size to determine it as
per OMF spec.

joncampbell123/doslib,joncampbell123/doslib,joncampbell123/doslib,joncampbell123/doslib,joncampbell123/doslib,joncampbell123/doslib