pgsql: ProcedureCreate neglected to record dependencies on default expr

ProcedureCreate neglected to record dependencies on default expressions.

Thus, an object referenced in a default expression could be dropped while
the function remained present.  This was unaccountably missed in the
original patch to add default parameters for functions.  Reported by
Pavel Stehule.

Branch
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REL8_4_STABLE

Details
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http://git.postgresql.org/pg/commitdiff/50af47f12bb8218625b7095da1d5678a1da8e9c2

Modified Files
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src/backend/catalog/pg_proc.c |    5 +++++
1 files changed, 5 insertions(+), 0 deletions(-)