change main parse call to use .extension (#1)

* change main parse call to use .extension

Using ends_with on arch linux (tried on both arco and manjaro distros) doesn't recognize that the path ends with .zip.
But using this (as done above as an extra check in the parse function) works.

* check if it's a file and not a dir first

since you cannot unwrap a none, which the extension from a dir is none

examples/capture_parser/main.rs

@@ -220,7 +220,7 @@ fn main() {
 	unsafe { PRINT_PACKETS = args.get(3).is_some(); }
 
 	let start = Instant::now();
-	let packet_count = if capture.ends_with(".zip") {
+	let packet_count = if !capture.is_dir() &&  capture.extension().unwrap() == "zip" {
 		parse(&capture, &mut cdclient)
 	} else {
 		visit_dirs(&capture, &mut cdclient, 0)