Demo: Fix collateral damage of 54a60aa
diff --git a/imgui_demo.cpp b/imgui_demo.cpp
index 8d9b119..4159a01 100644
--- a/imgui_demo.cpp
+++ b/imgui_demo.cpp
@@ -3835,6 +3835,7 @@
         if (adding_preview)
             points.pop_back();
     }
+    ImGui::End();
 }
 
 //-----------------------------------------------------------------------------