model: fix mdoc_or_fallback for nullables types

Signed-off-by: Alexandre Terrasa <alexandre@moz-code.org>

diff --git a/src/model/model.nit b/src/model/model.nit
index 3ceb9f3..c86bf96 100644 (file)
--- a/src/model/model.nit
+++ b/src/model/model.nit
@@ -1803,6 +1803,8 @@ class MNullableType
                if t == mtype then return self
                return t.as_nullable
        end
+
+       redef fun mdoc_or_fallback do return mtype.mdoc_or_fallback
 end
 
 # A non-null version of a formal type.