make the compiler happy when using --enable-maintainer-mode #838

Job	Run time
Empty APLOGNO() test	40s
Default	3m 42s
All-static modules	3m 27s
Prefork MPM, all-modules (except cgid)	4m 3s
Worker MPM, all-modules	4m 38s
Shared MPMs, all-modules	4m 24s
Event MPM, all-modules, mod_cgid only	3m 57s
Event MPM, all-modules, no CMSG_DATA	4m 7s
Default, all-modules + install	4m 18s
Default, all-modules, random test order	4m 5s
GCC 10 maintainer-mode w/-Werror, install + VPATH	3m 20s
All-modules, APR 1.7.4, APR-util 1.6.3	4m 18s
APR 1.8.x, APR-util 1.7.x	6m 14s
Pool-debug	5m 56s
Shared MPMs (event), pool-debug, SSL/TLS variants	9m 27s
Shared MPMs (worker), pool-debug, SSL/TLS variants	8m 52s
Shared MPMs (prefork), pool-debug, SSL/TLS variants	9m 21s
litmus WebDAV tests	2m 17s
litmus WebDAV tests, APR trunk, LMDB	2m 33s
Regenerate ap_expr	3m 54s
APR 1.7.4, APR-util 1.6.3, LDAP	3m 48s
APR trunk thread debugging	4m 29s
UBSan	4m 59s
ASan	6m 33s
ASan, pool-debug	6m 58s
HTTP/2 test suite	5m 19s
MOD_TLS test suite	2m 55s
Configured w/reduced exports	3m 2s
OpenSSL 3.1	3m 37s
OpenSSL 3.2 -Werror	3m 56s
OpenSSL 3.2 no-engine	3m 39s
OpenSSL 3.3 no-engine -Werror	3m 51s
	2h 26m 39s

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