Fixed small bug and test.

src/miner.rs

@@ -188,6 +188,9 @@ impl Miner {
                                 error!("To mine genesis block you need to make 'origin' an empty string in config.");
                             }
                         } else {
+                            if block.index == 1 {
+                                context.settings.origin = block.hash.to_string();
+                            }
                             context.chain.add_block(block);
                         }
                         context.bus.post(Event::MinerStopped);

src/simplebus.rs

@@ -52,7 +52,7 @@ mod tests {
         }
         let bus2 = bus.clone();
         thread::spawn(move || {
-            bus2.lock().unwrap().post(Event::BlockchainChanged);
+            bus2.lock().unwrap().post(Event::BlockchainChanged { index: 1 });
         });
 
         let guard = string.lock().unwrap();