Fix OPENDJ-819 : Malformed proxyAs arguments fail with ASN.1 decoding error.
This is just a one liner to use the proper error message (looks like a copy/paste mistake).
The error reported will now show as below:

$ ldapsearch -h localhost -p 1389 -D "uid=user.0,ou=people,dc=example,dc=com" -w password -Y "uid=user.1,ou=people,dc=example,dc=com" -b "dc=example,dc=com" 'uid=user.1'
SEARCH operation failed
Result Code:  2 (Protocol Error)
Additional Information:  The authorization ID "uid=user.1,ou=people,dc=example,dc=com" contained in the proxied authorization V2 control is invalid because it does not start with "dn:" to indicate a user DN or "u:" to indicate a username