Prevent NPE

CHANGELOG

@@ -1,5 +1,6 @@
 0.3.1
  * Fixed crash when clicking "Create new contact" button
+ * Fixed occasional crash when Bote disconnects from network
  * Added labels to the address book actions menu
 
 0.3 / 2014-12-01 / ebba8aac78d50eda9d25f936e8bd348553966649

app/src/main/java/i2p/bote/android/service/BoteService.java

@@ -90,10 +90,12 @@ public class BoteService extends Service implements NetworkStatusListener, NewEm
 
     @Override
     public void onDestroy() {
-        if (mTriedBindState) {
-            try {
-                mStateService.unregisterCallback(mStatusListener);
-            } catch (RemoteException e) {}
+        if (mTriedBindState && mStateConnection != null) {
+            if (mStateService != null) {
+                try {
+                    mStateService.unregisterCallback(mStatusListener);
+                } catch (RemoteException e) {}
+            }
             unbindService(mStateConnection);
         }
         mTriedBindState = false;