tests: silence -Wsign-conversion
, type tidy-ups
#13469
Closed
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Silence and fix sign conversion issues and compiler warnings
in tests. Also switch all unit tests to return
CURLcode
. Beforethis patch all unit tests and about a third of libtests did this.
Also fix mask signedness and/or types in some
printf
calls.Ref: #13467
Cherry-picked from #13489
Follow-up to 3829759 #12489
Closes #13469