Use macro for answer_sdp, formatting

rustfmt.toml

@@ -1,2 +1,4 @@
 max_width = 140
 fn_call_width = 100
+reorder_imports = true
+reorder_imported_names = true

src/lib.rs

@@ -1,9 +1,7 @@
 #[macro_use]
 extern crate cstr_macro;
-
 #[macro_use]
 extern crate lazy_static;
-
 #[macro_use]
 extern crate janus_plugin as janus;
 extern crate jansson_sys as jansson;
@@ -203,8 +201,8 @@ extern "C" fn handle_message(
     } else {
         let offer_str = unsafe { CString::from_raw(sdp_val as *mut _) };
         janus::log(LogLevel::Info, &format!("Received SDP offer: {}", offer_str.to_str().unwrap()));
-        let offer = janus::sdp::parse_sdp(offer_str, 512).unwrap();
-        let answer = janus::sdp::answer_sdp(&offer);
+        let offer = janus::sdp::parse_sdp(offer_str).unwrap();
+        let answer = answer_sdp!(&offer);
         let answer_str = janus::sdp::write_sdp(&answer);
         unsafe {
             let jsep = jansson::json_object();