Remove unnecessary casts in printf format arguments

Attached are some patches to remove unnecessary casts in printf format 
arguments.  Many of these are apparently left over from before use of 
%zu/%zd and PRIu64/PRId64 were possible.  Additionally, there are a few 
where the cast just cast to the type the input already had, or it just 
uselessly cast to a different type instead of using the right format 
argument.