Don't crash if pygments is not installed

dynastie/generators/index.py

@@ -205,7 +205,8 @@ class Index(DynastieGenerator):
                 break
             
             res = self.createCode(dom, dom.firstChild)
-            code = code.replace(code[start:end+11], res)
+            if res:
+                code = code.replace(code[start:end+11], res)
 
         return code
 
@@ -379,7 +380,7 @@ class Index(DynastieGenerator):
             from pygments.formatters import get_formatter_by_name
         except ImportError:
             self.addError('Pygments package is missing, please install it in order to use <dyn:code>')
-            return
+            return None
 
         language = node.getAttribute('language')
         

dynastie/sites/blog.soutade.fr/_ljdc.xml

@@ -1,5 +1,11 @@
 <?xml version="1.0" encoding="utf-8"?>
 <ljdc>
+    <entry>
+        <id>124083117265</id>
+        <address>http://thecodinglove.com/post/124083117265/git-push-force</address>
+        <title>Git push --force</title>
+        <img>http://tclhost.com/cMusPk2.gif</img>
+    </entry>
     <entry>
         <id>117591456984</id>
         <address>http://lesjoiesducode.fr/post/117591456984/quand-le-nouveau-essaie-de-suivre-le-dialogue</address>