update todo

pd/nw/todo.txt

@@ -317,6 +317,7 @@ Everything else: (A [x] means we've fixed it)
 [ ] don't implement tooltips until we have a single call to create an object
     plus all xlets. That way we can add an arg or two for the name and dir
     to find the help patch and get all descriptions in one goy
+[ ] make sure to free events in svg_free
 
 Crashers
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