pgsql: Fix memory leakage introduced into print_aligned_text by 8.4

Log Message:
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Fix memory leakage introduced into print_aligned_text by 8.4 changes
(failure to free col_lineptrs[] array elements) and exacerbated in the
current devel cycle (failure to free "wrap").  This resulted in moderate
bloat of psql over long script runs.  Noted while testing bug #5302,
although what the reporter was complaining of was backend-side leakage.

Modified Files:
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    pgsql/src/bin/psql:
        print.c (r1.120 -> r1.121)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/bin/psql/print.c?r1=1.120&r2=1.121)