Offset calculation is incorrect

[Z6543]

Hi!

There are three appearances of these comments in rop.py
# TODO: Another solution should be used here. This is a hack for compatibility reasons. to resolve the gadget address calculation of segments of elf files have a different base address if calculated segment.virtualAddress - segment.offset

rop.py

The offset calculation is incorrect for PE files if imagebase is provided as a parameter.
For me in the case of PE files
offset = section.offset
resolved the issue.