Fix 'hg serve' not using CSS.

hgweb.py (templatepath): Return normalized path [fixes later checks in staticfile()]

mercurial/hgweb.py

@@ -19,7 +19,7 b' def templatepath():'
     for f in "templates", "../templates":
         p = os.path.join(os.path.dirname(__file__), f)
         if os.path.isdir(p):
-            return p
+            return os.path.normpath(p)
 
 def age(x):
     def plural(t, c):