pgbouncer - pgbouncer: Make sure server->vars is always initialized.

Log Message:
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Make sure server->vars is always initialized.

Modified Files:
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pgbouncer/src:
proto.c (r1.10 -> r1.11)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgbouncer/pgbouncer/src/proto.c.diff?r1=1.10&r2=1.11)
proto.h (r1.3 -> r1.4)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgbouncer/pgbouncer/src/proto.h.diff?r1=1.3&r2=1.4)
server.c (r1.18 -> r1.19)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgbouncer/pgbouncer/src/server.c.diff?r1=1.18&r2=1.19)