32-bit test failures in `libgv/utf16chunk/chunkreader_test.go`

[fossdd]

go test fails on common 32-bit architectures like armhf, armv7, x86.

# go.mau.fi/mautrix-gvoice/pkg/libgv/utf16chunk_test [go.mau.fi/mautrix-gvoice/pkg/libgv/utf16chunk.test]
pkg/libgv/utf16chunk/chunkreader_test.go:111:51: cannot use 1 << 31 (untyped int constant 2147483648) as int value in argument to utf16chunk.UTF16Length (overflows)

The related line:

gvoice/pkg/libgv/utf16chunk/chunkreader_test.go

Line 111 in 75f3b0d

got, _ := utf16chunk.UTF16Length([]byte(input), 1<<31)

I guess that's not a a high priority but nice to fix. Thanks for all the mautrix-* stuff, really makes me happy!

BTW, to setup a armv7 build environment you could use docker if you don't have real hardware handy:

$ doas docker run --platform linux/arm/v7 -it -v .:/gvoice arm32v7/alpine
# apk add go
# cd gvoice
# go test -v ./pkg/libgv/utf16chunk/