BF: Handle when value in DictCtrl has a syntax error

Author: TEParsons

psychopy/app/builder/dialogs/paramCtrls.py

@@ -643,7 +643,9 @@ def __init__(self, parent,
         if isinstance(val, dict):
             newVal = []
             for key, v in val.items():
-                newVal.append({'Field': key, 'Default': v.val})
+                if hasattr(v, "val"):
+                    v = v.val
+                newVal.append({'Field': key, 'Default': v})
             val = newVal
         # If any items within the list are not dicts or are dicts longer than 1, throw error
         if not all(isinstance(v, dict) and len(v) == 2 for v in val):