Log Message:-----------Improve usefulness of an error message.
Modified Files:-------------- pginst/util/tasks: zip.cs (r1.1 -> r1.2) (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pginstaller/pginst/util/tasks/zip.cs.diff?r1=1.1&r2=1.2)
