Changes

| Oberes|| Donna|| Daoberes workspace || [http://zenit.senecac.on.ca/wiki/index.php/BIOF_20101_(AS1)_-_OOP344#int_bio_rows.28void.29 bio_rows] - Committed to trunk <br/> [http://zenit.senecac.on.ca/wiki/index.php/BIOF_20101_%28AS1%29_-_OOP344#int_bio_getch.28void.29 bio_getch] - Committed to trunk || [http://zenit.senecac.on.ca/wiki/index.php/BIOF_20101_(AS1)_-_OOP344#Line_Editor:_int_bio_edit.28.........29 bio_edit] - Validation logic for *offset, *curpos, & *offset = NULL *DONE*; Before editing begins, if *curpos & *offset have invalid values; Validation of positions that *curpos is never allowed to take; switch cases remaining