Incorrect sizeof for typeof incomplete array about arocc

[ehaas]

This seems to be the culprit:

arocc/src/aro/Parser.zig

Lines 1821 to 1825 in aa52b23

	if (init_d.d.ty.specifier == .incomplete_array) {
	// Modifying .data is exceptionally allowed for .incomplete_array.
	init_d.d.ty.data.array.len = init_list_expr.ty.arrayLen() orelse break :init;
	init_d.d.ty.specifier = .array;
	}