maxwidth option not handled by latex writer

[flg]

I needed to scale my seqdiags in the Latex output of a Sphinx doc. I wrote this little patch:

--- /usr/local/lib/python2.7/dist-packages/sphinxcontrib_seqdiag-0.6.0-py2.7.egg/sphinxcontrib/seqdiag.py       2014-04-08 14:55:21.395591062 +0200
+++ /home/legoff/Downloads/seqdiag.py.patched   2014-04-08 14:39:27.276320171 +0200
@@ -243,7 +243,14 @@
         raise nodes.SkipNode

     if fname is not None:
-        self.body.append('\\par\\includegraphics{%s}\\par' % fname)
+        # handle maxwidth option
+        image_size = image.pagesize()
+        if 'maxwidth' in options and options['maxwidth'] < image_size[0]:
+            ratio = float(options['maxwidth']) / image_size[0]
+            self.body.append('\\par\\includegraphics[scale=%f]{%s}\\par' % (ratio, fname))
+        else:
+            self.body.append('\\par\\includegraphics{%s}\\par' % fname)
+
     raise nodes.SkipNode

As you can see the patch is on version 0.6.0.