Take a reference to the stream instead of the stream itself (in `is_tty`

Cargo.toml

 [package]
 name = "termion"
-version = "1.0.8"
+version = "1.1.0"
 authors = ["ticki <Ticki@users.noreply.github.com>"]
 description = "A bindless library for manipulating terminals."
 repository = "https://github.com/ticki/termion"

src/tty.rs

@@ -3,7 +3,7 @@ use std::os::unix::io::AsRawFd;
 
 /// Is this stream an TTY?
 #[cfg(not(target_os = "redox"))]
-pub fn is_tty<T: AsRawFd>(stream: T) -> bool {
+pub fn is_tty<T: AsRawFd>(stream: &T) -> bool {
     use libc;
 
     unsafe { libc::isatty(stream.as_raw_fd()) == 1}
@@ -11,7 +11,7 @@ pub fn is_tty<T: AsRawFd>(stream: T) -> bool {
 
 /// This will panic.
 #[cfg(target_os = "redox")]
-pub fn is_tty<T: AsRawFd>(_stream: T) -> bool {
+pub fn is_tty<T: AsRawFd>(_stream: &T) -> bool {
     unimplemented!();
 }