cleanup on error handling when a transaction is cancelled

plugins/keepkey.py

@@ -238,8 +238,9 @@ class Plugin(BasePlugin):
         try:
             signed_tx = client.sign_tx('Bitcoin', inputs, outputs)[1]
         except Exception, e:
+            self.handler.stop()
             give_error(e)
-        finally:
+        
         self.handler.stop()
 
         raw = signed_tx.encode('hex')