Fix to close the shelve catalog to guarantee changes are written to d…

…isk. Fernando Perez fix for random uncessary recompilation with weave.

weave/catalog.py

@@ -653,6 +653,7 @@ def add_function_persistent(self,code,function):
             cat[pkey] = [mod_path] + cat.get(pkey,[])
         except:
             pass
+	cat.close()
 
     def fast_cache(self,code,function):
         """ Move function to the front of the cache entry for code