Make sure we give an appropriate user-facing error when attempting

Tom Lane <tgl@sss.pgh.pa.us>

Commit: b651b2a5c257945ba0ef78df22948cf805ba2b57
Author: Tom Lane <tgl@sss.pgh.pa.us>
Date: 2008-11-29T00:13:21Z
Releases: 8.4.0
Make sure we give an appropriate user-facing error when attempting
to drop a table that is referenced by an open cursor.  Fix unstable
ecpg regression test result that was produced by this oversight.

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