pgbouncer - pgbouncer: fix some printf casts

Log Message:
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fix some printf casts

Modified Files:
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pgbouncer/include:
system.h (r1.6 -> r1.7)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgbouncer/pgbouncer/include/system.h.diff?r1=1.6&r2=1.7)
pgbouncer/src:
admin.c (r1.24 -> r1.25)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgbouncer/pgbouncer/src/admin.c.diff?r1=1.24&r2=1.25)
stats.c (r1.4 -> r1.5)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgbouncer/pgbouncer/src/stats.c.diff?r1=1.4&r2=1.5)