docs: add missing return statement in examples #17024
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Add missing return statement in
CURLMOPT_TIMERDATA.md
andCURLMOPT_TIMERFUNCTION.md
.It's crucial return a value from the timer callback. A value can be set in register by another call and then taken from the same register as return value for timer callback. All in-progress transfers will be aborted in this
curl_multi
if-1
is returned.