Fixed MainActivity crash on startup when not bound to server.

app/src/main/java/uk/org/openseizuredetector/MainActivity.java

@@ -291,7 +291,6 @@ public class MainActivity extends Activity {
     }
 
 
-
     /*
      * updateServerStatus - called by the uiTimer timer periodically.
      * requests the ui to be updated by calling serverStatusRunnable.
@@ -419,6 +418,7 @@ public class MainActivity extends Activity {
             // Deal with Cancel Audible button
             Button cancelAudibleButton =
                     (Button) findViewById(R.id.cancelAudibleButton);
+            if (mConnection.mBound)
                 if (mConnection.mSdServer.isAudibleCancelled()) {
                     cancelAudibleButton.setText("Audible Alarms Cancelled "
                             + "for "
@@ -479,7 +479,6 @@ public class MainActivity extends Activity {
     }
 
 
-
     private void showAbout() {
         View aboutView = getLayoutInflater().inflate(R.layout.about_layout, null, false);
         String versionName = mUtil.getAppVersionName();