Mark the getter functions as const.

[Deleted user]

The current version of inih has marked the GetX() methods as const, and they should be updated here as well. Since they don't modify any state of the class, this should be a fairly simple fix.

[jtilly]

Thanks for the pointer. Makes sense to me. I should probably update everything to a more recent version of inih instead of just making small edits on the fly.