[sql/postgresql] Parser prints parse errors for "case.sql" (and others), but passes testers!!

[kaby76]

This is pretty weird. sql/postgresql produces errors for case.sql, but it is not flagged in the test results. Note, it would skip a bad parse if an ".error" file exists, but in this case, no case.sql.errors file exists. The parser flags a parse error for the Maven tester and regtest.sh. So, something is wrong in the Antlr runtime. It should not be ignoring a parse error.