got rid of magic number

lib/exchange_rate.py

@@ -31,7 +31,7 @@ class Exchanger(threading.Thread):
         connection = httplib.HTTPSConnection('intersango.com')
         connection.request("GET", "/api/ticker.php")
         response = connection.getresponse()
-        if response.status == 404:
+        if response.reason == httplib.responses[httplib.NOT_FOUND]:
             return
         response = json.loads(response.read())
         # 1 = BTC:GBP

lib/gui_lite.py

@@ -535,7 +535,7 @@ class MiniActuator:
             set_quote_currency(currency)
 
     def set_config_currency(self, conversion_currency):
-        """Change the fiat currency conversion country."""
+        """Change the wallet fiat currency country."""
         self.wallet.conversion_currency = conversion_currency
 
     def copy_address(self, receive_popup):