gccrs: Small fixes for #[repr(transparent)]#4716
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gcc/rust/ChangeLog: * typecheck/rust-hir-type-check-item.cc (TypeCheckItem::visit(StructStruct)): Update E0690 error message to use the correct variable for number of fields. * typecheck/rust-tyty.cc (ArrayType::is_zero_sized): Catch edge case of array's element type being a ZST with capacity is more than 0. gcc/testsuite/ChangeLog: * rust/compile/repr_transparent_fields.rs: Add more test cases. Signed-off-by: Yap Zhi Heng <yapzhhg@gmail.com>
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Thanks to @CohenArthur for pointing out the edge case!