Fix sign conversion warnings, part 1 #14448
Merged
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I decided to go back to one of my old long term projects, which is to enable the
-Wsign-comparewarning, which is currently suppressed inZend.m4.I have an old branch that I rebased, however I have lost track of what is related or not to changes I made during the lifespan of that branch, and there are a lot of changes. So I am extracting some of the more immediate changes into smaller PRs.