Binding invalid Currency gives nonsense at end of the message

[Jerbell]

This has been an issue since 2.3.4 (and 2.4.0 presumably). It was put in for fix #444.
An invalid Currency used to say:
"Can not construct instance of java.util.Currency from String value 'XYZ': not a valid textual representation"
Now it says:
"Can not construct instance of java.util.Currency from String value 'XYZ': not a valid textual representation problem: null"
The code is in com.fasterxml.jackson.databind.deser.std.FromStringDeserializer.
Perhaps a simple fix is to check:
if (cause != null && cause.getMessage() != null) { msg += " problem: "+cause.getMessage(); }
adding in: "&& cause.getMessage() != null"