canvasmain: Fix typing error in render_error_details

biolab · Sep 15, 2020 · 23b7b6b · 23b7b6b
1 parent c4e03a0
commit 23b7b6b
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/orangecanvas/application/canvasmain.py b/orangecanvas/application/canvasmain.py
@@ -2698,7 +2698,7 @@ def collectall(
                                      IncompatibleChannelTypeError))
     )
     contents = []
-    if missing_node_defs is not None:
+    if missing_node_defs:
         contents.extend([
             "Missing node definitions:",
             *["  \N{BULLET} " + e.args[0] for e in missing_node_defs],