[gtk-doc] db2html: add converter for 'warning'

[Stefan Sauer <stefkost src gnome org>]

commit 4fe78f8db3c3abc6703955930658403d03845538
Author: Stefan Sauer <ensonic users sf net>
Date:   Sun Jan 14 19:50:15 2018 +0100

    db2html: add converter for 'warning'

 tools/db2html.py |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/tools/db2html.py b/tools/db2html.py
index e528b6c..247eebd 100644
--- a/tools/db2html.py
+++ b/tools/db2html.py
@@ -395,6 +395,7 @@ convert_tags = {
     'structfield': convert_em_class,
     'type': convert_span,
     'ulink': convert_ulink,
+    'warning': convert_div,
 }