From ecb9184e1a2589d6c9fc545369b182cc6b6826ff Mon Sep 17 00:00:00 2001
From: Grant Sanderson <grant@3blue1brown.com>
Date: Tue, 19 Mar 2019 17:31:03 -0700
Subject: [PATCH] Small addition for clarity

---
 manimlib/scene/scene.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/manimlib/scene/scene.py b/manimlib/scene/scene.py
index 6776da62..2a0ca6b4 100644
--- a/manimlib/scene/scene.py
+++ b/manimlib/scene/scene.py
@@ -503,7 +503,7 @@ class Scene(Container):
                 self.update_mobjects(dt)
                 self.update_frame()
                 self.add_frames(self.get_frame())
-                if stop_condition and stop_condition():
+                if stop_condition is not None and stop_condition():
                     time_progression.close()
                     break
         elif self.skip_animations: