fix return code for check database run with 'not applicable'

lib-php/admin/check_import_finished.php

@@ -8,4 +8,3 @@ loadSettings(getcwd());
 (new \Nominatim\Shell(getSetting('NOMINATIM_TOOL')))
     ->addParams('admin', '--check-database')
     ->run();
-

nominatim/tools/check_database.py

@@ -70,7 +70,7 @@ def check_database(config):
         if ret == CheckState.FATAL:
             conn.close()
             return 1
-        if ret != CheckState.OK:
+        if ret in (CheckState.FATAL, CheckState.FAIL):
             overall_result = 1
 
     conn.close()