examples: fix/silence -Wsign-conversion
#13501
Closed
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extend
FD_SET()
hack to all platforms (was only Cygwin).Warnings may also happen in other envs, e.g. OmniOS.
Ref: https://github.com/libssh2/libssh2/actions/runs/8854199687/job/24316762831#step:3:2021
tidy-up
CURLcode
vsint
use.cast an unsigned to
long
before passing tocurl_easy_setopt()
.Cherry-picked from #13489
Follow-up to 3829759 #12489
Closes #13501