checker: fix private type · vlang/v@8db36f8

module `main` type `MyInt` is private

module `encoding.csv` type `encoding.csv.CellValue` is private

module `encoding.csv` type `encoding.csv.CellValue` is private

module `encoding.csv` type `encoding.csv.CellValue` is private

missing return at the end of an anonymous function

cannot assign to `f`: expected `fn (int) u8`, not `int literal`

cannot assign to `p`: expected `&fn (int) u8`, not `&[]fn (int) u8`

undefined ident: `i`

`println` can not print void expressions

cannot assign to `f`: expected `fn (int) u8`, not `fn (mut []int)`

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