Merge branch 'master' into 'master'

Fix Issue #83 - Panic on write without filename

See merge request redox-os/sodium!87

src/io/file.rs

@@ -37,10 +37,10 @@ impl Editor {
     }
 
     /// Write the file.
-    pub fn write<'a> (&'a mut self, mut path: &'a str) -> FileStatus {
+    pub fn write<'a> (&'a mut self, path: &'a str) -> FileStatus {
         self.buffers.current_buffer_info_mut().title = Some(path.into());
         if path == "" {
-            path = self.files[0].as_str();
+            return FileStatus::Other;
         }
         if let Some(mut file) = File::create(path).ok() {
             if file.write(self.buffers.current_buffer().to_string().as_bytes())