test suite triggers Bug: Result does not fit in tor_timegm but does not fail

on 32bit archs like ia32 and armhf:

tortls/cert_is_valid: [forking] OK
tortls/context_init_one: [forking] OK
util/time: Mar 05 13:17:01.229 [warn] tor_timegm(): Bug: Result does not fit in tor_timegm (on Tor 0.2.9.10 )
Mar 05 13:17:01.229 [warn] tor_timegm(): Bug: Result does not fit in tor_timegm (on Tor 0.2.9.10 )
Mar 05 13:17:01.229 [warn] tor_timegm(): Bug: Result does not fit in tor_timegm (on Tor 0.2.9.10 )
OK
util/parse_http_time: Mar 05 13:17:01.229 [warn] tor_timegm(): Bug: Result does not fit in tor_timegm (on Tor 0.2.9.10 )
OK
util/config_line: OK
util/config_line_quotes: OK

[ from e.g. https://buildd.debian.org/status/fetch.php?pkg=tor&arch=i386&ver=0.2.9.10-1&stamp=1488719845&raw=0 ]

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