gh-111178: Define visitproc
callback functions properly and remove unnecessary casts in gcmodule.c
#112687
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Because many other changes are likely needed for gh-111178, I have opened this PR separately for review by the respective codeowner. The error for
visit_reachable()
might be the most common one I encounter.Potential compiler warnings addressed:
A few example UBSan
-fsanitize=function
errors addresses: