FAPI: Fix misleading error message. #2269

Job	Run time
scanbuild	6m 32s
build-test (ubuntu-20.04, gcc)	4m 25s
test-no-crypto-build	1m 15s
build-test (ubuntu-20.04, clang)	4m 12s
test-tcti-config	14m 3s
build-test (fedora-32, gcc)	4m 43s
build-test (fedora-32, clang)	4m 56s
coverity-test	0s
build-test (opensuse-leap, gcc)	4m 27s
build-test (opensuse-leap, clang)	4m 38s
build-test (ubuntu-22.04, gcc)	4m 28s
build-test (ubuntu-22.04, clang)	4m 35s
test-coverage	5m 10s
build-test (alpine-3.15, gcc)	4m 3s
build-test (alpine-3.15, clang)	4m 39s
test-fuzz	2m 32s
test-mbedtls (ubuntu-20.04)	2m 42s
test-mbedtls (ubuntu-22.04-mbedtls-3.1)	2m 39s
	1h 19m 59s

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