stackbuilder - wizard: Ensure the wizard will exit cleanly on Mac when

Log Message:
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Ensure the wizard will exit cleanly on Mac when completed.

Modified Files:
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wizard:
StackBuilder.cpp (r1.8 -> r1.9)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/stackbuilder/wizard/StackBuilder.cpp.diff?r1=1.8&r2=1.9)