main.rs: Add `try!` around STDERR writer

The call to write to STDERR returns a `Result`. Wrap it in a `try!` to
handle the result and eliminate the "unused result" compilation
warning.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/main.rs b/src/main.rs
index c7137f6..fcd9cfd 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -14,7 +14,7 @@ fn open_stream() -> io::Result<()> {
                 println!("{}", url);
             }
             Err(e) => {
-                write!(io::stderr(), "{}", e);
+                write!(io::stderr(), "{}", e)?;
             }
         }
     }