Additional fixup support

[enderdrag64]

Hi again, I made some progress getting the non-glide version of Redguard to work with this tool (completed step 1 of your guide here: https://github.com/M-HT/SR/issues/70)

However, running SR in OUT_ORIG mode on the glide version fails with the following error:

After a little bit of research I found this information from the Open Watcom manual:

It seems that SR currently only supports a subset of these fixup types:

Not only is fixup type 19 (0x13) not supported, but there seems not to be support for fixup type 3 (0x03) either. Is this something that can be implemented? I'd attempt it myself but I'm still not completely familiar with the complexities of DOS era relocation tables

[M-HT]

I added support for fixup type 19 in the latest commit.

[enderdrag64]

Awesome thank you!