Markdown parser: fix method call on null

diff --git a/src/libvaladoc/documentation/gtkdocmarkdownparser.vala b/src/libvaladoc/documentation/gtkdocmarkdownparser.vala
index 53dfe18aeab974437ddb32b5947bab789438bc2e..b5e5192a54c95110dbcff8971020737175fc4e6b 100644 (file)
--- a/src/libvaladoc/documentation/gtkdocmarkdownparser.vala
+++ b/src/libvaladoc/documentation/gtkdocmarkdownparser.vala
@@ -367,7 +367,7 @@ public class Valadoc.Gtkdoc.MarkdownParser : Object, ResourceLocator {
                                        code.language = lang;
 
                                        if (lang == null) {
-                                               parser.warning (token, "Unknown language `%s' in source code block |[<!-- language=\"\"".printf (lang.to_string ()));
+                                               parser.warning (token, "Unknown language `%s' in source code block |[<!-- language=\"\"".printf (lang_name));
                                        }
 
                                        source = source.offset (source.index_of_char ('>') + 1);