Remove iteration clause from LOOP body code

[paulapatience]

While here, simplify the loops — the compiler should be able to determine appropriate types based on the loop bounds. Also reindent.

[Zulu-Inuoe]

Thanks. I'll take a closer look.
I'm not too concerned about optimizing around types here since it's only done at load-time. I originally annotated them to help with my sanity in porting the code over, so any simplification is welcome