fix unexpected exception

apptax/app.py

@@ -7,6 +7,7 @@
 from flask_migrate import Migrate
 from werkzeug.middleware.proxy_fix import ProxyFix
 from sqlalchemy.exc import ProgrammingError
+from sqlalchemy.orm.exc import NoResultFound
 
 from apptax.database import db
 
@@ -68,7 +69,7 @@ def create_app():
             from pypnusershub.db.models import Application
 
             th_app = Application.query.filter_by(code_application="TH").one()
-        except ProgrammingError:
+        except (ProgrammingError, NoResultFound):
             logging.warning(
                 "Warning: unable to find TaxHub application, database not yet initialized?"
             )