Backward compatibility

app/src/main/java/eu/faircode/email/ActivitySetup.java

@@ -702,6 +702,7 @@ public class ActivitySetup extends ActivityBilling implements FragmentManager.On
                         }
 
                         // Contacts
+                        if (jaccount.has("contacts")) {
                             JSONArray jcontacts = jaccount.getJSONArray("contacts");
                             for (int c = 0; c < jcontacts.length(); c++) {
                                 JSONObject jcontact = (JSONObject) jcontacts.get(c);
@@ -712,6 +713,7 @@ public class ActivitySetup extends ActivityBilling implements FragmentManager.On
                                     Log.i("Imported contact=" + contact);
                                 }
                             }
+                        }
 
                         // Update swipe left/right
                         db.account().updateAccount(account);