More cleanup.

Also, this MR closes #48

src/machine.rs

@@ -296,7 +296,8 @@ impl Inner {
     }
 
     fn replace_state(&self, new_state: MachineState) -> MachineState {
-        self.db.put(&self.id, &new_state);
+        // Ignore for now, nothing we can do either way.
+        let _ = self.db.put(&self.id, &new_state);
         self.state.replace(new_state)
     }
 

src/main.rs

@@ -113,8 +113,6 @@ fn main() {
         }
     }
 
-    let retval;
-
     // Scope to drop everything before exiting.
     {
         // Initialize the logging subsystem first to be able to better document the progress from now
@@ -126,10 +124,9 @@ fn main() {
         info!(log, "Starting");
 
         match maybe(matches, log.clone()) {
-            Ok(_) => retval = 0,
+            Ok(_) => {},
             Err(e) => {
                 error!(log, "{}", e);
-                retval = -1;
             }
         }
         drop(guard);