Fix bugs in search (string conversion)

generators/search.py

@@ -44,7 +44,10 @@ class Search(Index):
 
         posts = []
         for post_id in post_list:
+            try:
                 post = Post.objects.get(pk=post_id)
+            except:
+                continue
             if not post is None:
                 posts.append(post)
 

search.py

@@ -148,7 +148,7 @@ class Search:
     def _index_post(self, blog, post, saveDatabase=True):
         hashtable = self._loadDatabase(blog)
 
-        filename = blog.src_path + '/_post/' + post
+        filename = blog.src_path + '/_post/' + str(post)
 
         if hashtable is None:
             return self.create_index(blog)