Fix OPENDJ-632 ldapmodify: wrong return code when an invalid port is specified

Chris Ridd

01.45.2012 bdfbf399d1f5682e35a2f0cd600d3764008fe8f1

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user-friendly-name=Sk\u0142adnia Atrybut\u00f3w
user-friendly-plural-name=Sk\u0142adnie Atrybut\u00f3w