nitiwiki: update because `ini[]` does return nullable

Signed-off-by: Jean Privat <jean@pryen.org>

diff --git a/contrib/nitiwiki/src/wiki_base.nit b/contrib/nitiwiki/src/wiki_base.nit
index 8257091..5f093a0 100644 (file)
--- a/contrib/nitiwiki/src/wiki_base.nit
+++ b/contrib/nitiwiki/src/wiki_base.nit
@@ -616,8 +616,7 @@ class WikiConfig
 
        # Returns the config value at `key` or return `default` if no key was found.
        private fun value_or_default(key: String, default: String): String do
-               if not has_key(key) then return default
-               return self[key]
+               return self[key] or else default
        end
 
        # Site name displayed.