Fix error when importing a GEDCOM file into an existing tree

Fixes #13726.

Author: Nick-Hall

gramps/plugins/lib/libgedcom.py

@@ -3062,7 +3062,7 @@ def __init__(
         data = next(cursor)
         while data:
             (handle, val) = data
-            self.place_names[val[2]].append(handle)
+            self.place_names[val.title].append(handle)
             data = next(cursor)
         cursor.close()