Suppress one 'int / unsigned int comparisom' warning

[eddelbuettel]

This addresses the (spurious but tedious) one warning in #1152, and while we are at it, updates in that file alone the few uses of unsigned int to uint32_t. The second part is more debatable but should be harmless and does of course test out fine.

Checklist

• Code compiles correctly
• R CMD check still passes all tests
• Prefereably, new tests were added which fail without the change
• Document the changes by file in ChangeLog

[Enchufa2]

LGTM. Due to their similarities, maybe it's a good opportunity to switch to uint32_t in SelfHash.h too.

[eddelbuettel]

Due to their similarities, maybe it's a good opportunity to switch to uint32_t in SelfHash.h too.

Agreed. I already did a recursive grep and it is very few files. But not urgent, and I wanted to keep this small.

Thanks for the review!