Fix for #502

[nathan-russell]

As discussed in #502, use rcpp_long_long_type and rcpp_ulong_long_type in algorithm.h to avoid warnings when compiling with clang in pedantic mode.

[eddelbuettel]

@dcdillon Any comment on this and/or #502? Should be smooth sailing...

[dcdillon]

I would actually suggest commenting out all the long long stuff for now. It doesn't need to be there for now for algorithm to work

[eddelbuettel]

I appears to work just fine with the patch by @nathan-russell -- same behaviour in rev.dep checks as the test late last week, ie zero new failures.

So I leaning towards a) keeping it and b) folding the PR in.

[dcdillon]

Suits me. Basically if the long long code in ctype ever gets called by algorithm it will break somewhere else anyhow. It's just there for completeness.

Additionally the warning either points to an error in clang or in the Rcpp long long protection macro. We should figure out which and report it.

[dcdillon]

I'd offer to do it but all I have is a 5 inch screen until the 23rd.

[eddelbuettel]

This looks good and passed a full rev.dep for which I just committed the logs / results.