Fix NPE when 'merge contacts' encounters unknown names.

public class MergeContactAdapter extends BaseAdapter {

    private Context mContext;

    private ArrayList<DuplicatesUtils.MergeContacts> mMergeList;

    private final CharSequence mUnknownNameText;

    public MergeContactAdapter(Context context) {

        this.mContext = context;

        mUnknownNameText = context.getText(android.R.string.unknownName);

    }

    @Override

            number = info.getPhones().get(0);

        }

        // show the number, if it exists. Otherwise just show the name.

        childView.setUnknownNameText(mUnknownNameText);

        childView.setPhoneNumber(number, null);

        childView.setDisplayName(info.getName());

    }