Its nothing exactly complex - just a few lines commented out to keep ET happy
The other changes are the re-introduction of botlib/* and qcommon/q_shared.h from ioq3. Since q_shared.h is one of the files that is actually changed in OA, that *really* should be in your SVN (the ioq3 one doesnt work without applying the diffs). To be clear, OA does not build from your SVN, so it is not "complete corresponding machine-readable source code" (GPL).
I've actually cheated and hacked up the one from game/ which is unused simply cos it pulled in less dependencies.