new ArrayList API: fix std.ArrayListSentineled
new ArrayList API: fix std.ArrayListSentineled

andrewrk/zig,zig-lang/zig,zig-lang/zig,raulgrell/zig,andrewrk/zig,raulgrell/zig,zig-lang/zig,raulgrell/zig,raulgrell/zig,raulgrell/zig