wazevo: fixes FunctionDefinition index for listeners #4054

Job	Run time
Build Zig test binary	5s
Build TinyGo test binary	8s
Go-1.21 (Ubuntu, amd64, baseline)	3m 37s
libsodium (Ubuntu, amd64, optimizing)	3m 44s
Go-1.22 (Ubuntu, amd64, baseline)	3m 39s
libsodium (macOS, arm64, optimizing)	1s
wasi-testsuite (ubuntu-22.04)	25s
Go-1.21 (macOS, amd64, baseline)	1s
wasi-testsuite (macos-12)	1s
Go-1.22 (macOS, amd64, baseline)	1s
wasi-testsuite (windows-2022)	1m 35s
Go-1.21 (Windows, amd64, baseline)	3m 16s
Go-1.22 (Windows, amd64, baseline)	3m 18s
Go-1.21 (macOS, arm64, optimizing)	1s
Go-1.22 (macOS, arm64, optimizing)	1s
Go-1.21 (Ubuntu, amd64, optimizing)	3m 31s
Go-1.22 (Ubuntu, amd64, optimizing)	3m 36s
Zig (Ubuntu, amd64, baseline)	3m 31s
Zig (macOS, amd64, baseline)	1s
Zig (Windows, amd64, baseline)	3m 2s
Zig (macOS, arm64, optimizing)	1s
Zig (Ubuntu, amd64, optimizing)	1m 59s
TinyGo (Ubuntu, amd64, baseline)	1m 55s
TinyGo (macOS, amd64, baseline)	1s
TinyGo (Windows, amd64, baseline)	2m 41s
TinyGo (macOS, arm64, optimizing)	1s
TinyGo (Ubuntu, amd64, optimizing)	2m 34s
	42m 46s

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