main.rs: Change port parsing `unwrap` to `expect`

Using `expect` seems nicer here because it allows us to provide a more
meaningful error message.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/main.rs b/src/main.rs
index 7956797..96a3986 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -73,7 +73,7 @@ fn main() {
     };
 
     let port: u16 = match opt_matches.opt_str("p") {
-        Some(p) => p.parse().unwrap(),
+        Some(p) => p.parse().expect("Unable to parse specified port"),
         None => DEFAULT_PORT,
     };