Fixed restoring last open tab

mytwitter.py

@@ -78,11 +78,10 @@ class MyTwitter():
         self.account_select.set_active(0)
 
         # Add the tabs from last session to the notebook
+        page_num = self.db['active_page']
         for tab, single_tweet in self.db['open_tabs']:
             self.add_to_notebook(tab, single_tweet)
-
-        # Switch to the correct page from the last session
-        self.tweet_notebook.set_current_page(self.db['active_page'])
+        self.tweet_notebook.set_current_page(page_num)
 
         # Put Home, @user, Direct Messages, and lists in the View menu for
         # each user