Fix "buffer is too large"

[bandrews-spirent]

Increase to uint64

[salesforce-cla]

Thanks for the contribution! Before we can merge this, we need @bandrews-spirent to sign the Salesforce Inc. Contributor License Agreement.

[twarit-waikar]

I don't know enough about the libgit2 internals but probably this header needs to be changed as well?
https://github.com/salesforce/p4-fusion/blob/master/vendor/libgit2/include/git2/index.h#L62

But before that, could you give an example where this change is required?

[bandrews-spirent]

To be complete, probably.
If you have large files in P4 greater than uint32 size, you will see the issue. With this change, I was able to create the git repo when the source P4 repo had large binary files.

[bandrews-spirent]

Actually, I don't know why the limitation is there. The len parameter being passed in is already size_t. It's almost like the check is deliberate. (or was it naive)
I was able to use my change w/out any problems, but I can't guarantee it's not going to break other cases, because I don't understand the buffer check. Closing the PR.

[twaritwaikar]

It might make sense to have this documented in the README/FAQ if someone encounters this problem and might want to invest in a potentially dangerous solution. Maybe the Git CLI would bug out if it found a file larger than UINT32T_MAX?