Use ctest2 instead of the original to fix warnings

Cargo.toml

@@ -58,5 +58,5 @@ stock-zlib = []
 # Deprecated: the assembly routines are outdated, and either reduce performance
 # or cause segfaults.
 asm = []
-# Enable this feature if you want to have a staticly linked libz
+# Enable this feature if you want to have a statically linked libz
 static = []

systest/Cargo.toml

@@ -9,7 +9,7 @@ libz-sys = { path = "..", default-features = false, features = ["libc"] }
 libc = "0.2"
 
 [build-dependencies]
-ctest = "0.1"
+ctest2 = "0.3"
 
 [features]
 libz-static = ["libz-sys/static"]

systest/build.rs

@@ -1,14 +1,14 @@
-extern crate ctest;
+extern crate ctest2;
 
 use std::env;
 
 fn main() {
-    let mut cfg = ctest::TestGenerator::new();
+    let mut cfg = ctest2::TestGenerator::new();
     cfg.header("zlib.h");
     if let Some(s) = env::var_os("DEP_Z_INCLUDE") {
         cfg.include(s);
     }
-    cfg.type_name(|n, _| {
+    cfg.type_name(|n, _, _| {
         if n == "internal_state" {
             format!("struct {}", n)
         } else {