Fuzzer: Adjust function declaration #2389

Job	Run time
build on fedora:40 (gcc, true)	1m 44s
build on fedora:40 (clang, false)	1m 44s
build on fedora:39 (gcc, false)	1m 54s
build on fedora:39 (clang, false)	1m 55s
build on ubuntu:24.04 (gcc,false)	1m 16s
build on ubuntu:24.04 (clang,false)	1m 45s
build on ubuntu:23.10 (gcc,false)	1m 24s
build on ubuntu:23.10 (clang,false)	1m 34s
build on macos (macos-latest)	43s
build on macos (macos-latest-xlarge)	47s
build on ubuntu:22.04 (gcc,false)	1m 19s
build on ubuntu:22.04 (clang,true)	1m 29s
build on ubuntu:20.04 (gcc,false)	1m 24s
build on ubuntu:20.04 (clang,false)	1m 39s
build on debian:12 (gcc,false)	1m 26s
build on debian:12 (clang,false)	1m 34s
build on debian:11 (gcc,false)	1m 13s
build on debian:11 (clang,false)	1m 37s
run unit tests (ubuntu:22.04, clang)	13m 35s
run unit tests (fedora:40, gcc)	11m 58s
	52m 0s

Provide feedback