win: fix leak processing fs event #5

Job	Run time
build-android	3m 31s
build-ios (macos-13)	2m 23s
build-cross-qemu-arm	1m 43s
build-ios (macos-14)	54s
build-cross-qemu-armhf	1m 49s
build-cross-qemu-aarch64	1m 55s
build-cross-qemu-riscv64	1m 40s
build-linux	1m 26s
build-cross-qemu-ppc	1m 45s
build-cross-qemu-ppc64	1m 42s
build-macos (macos-13)	3m 8s
build-cross-qemu-ppc64le	1m 53s
build-macos (macos-14)	2m 21s
build-cross-qemu-s390x	1m 50s
build-cross-qemu-mips	1m 53s
build-cross-qemu-mips64	1m 43s
build-cross-qemu-mipsel	2m 46s
build-cross-qemu-mips64el	1m 42s
build-cross-qemu-arm (u64 slots)	1m 44s
build-cross-qemu-aarch64 (u64 slots)	2m 4s
build-cross-qemu-ppc (u64 slots)	2m 33s
build-cross-qemu-ppc64 (u64 slots)	1m 55s
	44m 20s

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