This cleans up the "easy" warning fixes which can be made using my
Regress script, comparing object-files before/after the edits:
The changes are casts, which quiet the gcc warnings about implicit conversion that my "gcc-normal" script would show. I avoided reformatting the code.
The change reduces the number of gcc warnings from 769 to 163.
Signed-off-by: Thomas E. Dickey email@example.com