ni: fixed crash on empty class comment

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

diff --git a/src/ni.nit b/src/ni.nit
index 7a69a8d..aad0b02 100644 (file)
--- a/src/ni.nit
+++ b/src/ni.nit
@@ -197,8 +197,10 @@ class NitIndex
 
                        pager.add("# {mclass.namespace}\n".bold)
                        pager.add("{mclass.short_doc}")
-                       pager.add_rule
-                       pager.addn(nclass.n_doc.comment.green)
+                       if not nclass.n_doc == null then
+                               pager.add_rule
+                               pager.addn(nclass.n_doc.comment.green)
+                       end
                        pager.add_rule
                        if not mclass.parameter_types.is_empty then
                                pager.add("# formal types".bold)