Add `ToCString` trait.

Allows easy conversion of any `T: AsOsStr` to a `CString`, whose
`as_ptr()` method is quite convenient for FFI calls.

Note that `std::path::Path` implements `AsOsStr`, which means we can
easily take paths and get a pointer to `*const libc::c_char`.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/lib.rs b/src/lib.rs
index f7358b7..379be2f 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,4 +1,4 @@
-#![feature(core, libc)]
+#![feature(core, libc, std_misc)]
 extern crate libc;
 
 #[macro_use]