Removed libc dependency by using std::os::raw types.

Author: SSheldon

Cargo.toml

@@ -13,8 +13,5 @@ exclude = [".gitignore"]
 
 build = "build.rs"
 
-[dependencies]
-libc = ">= 0.1, < 0.3"
-
 [build-dependencies]
 gcc = "0.3"

src/lib.rs

@@ -1,10 +1,8 @@
 //! Rust interface for Objective-C's `@throw` and `@try`/`@catch` statements.
 
-extern crate libc;
-
 use std::mem;
+use std::os::raw::{c_int, c_void};
 use std::ptr;
-use libc::{c_int, c_void};
 
 #[link(name = "objc", kind = "dylib")]
 extern { }