Merge pull request #2197 from hagau/fix_npe_dedup

Fix NPE upon dialog dismissal in RemoteDeduplicatePresenter

OpenKeychain/src/main/java/org/sufficientlysecure/keychain/remote/ui/dialog/RemoteDeduplicatePresenter.java

@@ -101,7 +101,9 @@ class RemoteDeduplicatePresenter implements LoaderCallbacks<List<KeyInfo>> {
 
     @Override
     public void onLoaderReset(Loader loader) {
-        view.setKeyListData(null);
+        if (view != null) {
+            view.setKeyListData(null);
+        }
     }
 
     void onClickSelect() {