(JDBC) KEY_SEQ in Foreign Key result set starts at 0, should be 1

Using the JDBC interface to inspect the metadata in a table, the
ResultSet returned from using DatabaseMetaData.getImportedKeys
includes values for KEY_SEQ.  This is an integer value and in the
case of Postgreql starts at zero.

I can find no formal definition of where this value should start
but the ODBC rules explicitly state that it should start at 1 and
both DB/2 and MySQL seem to agree.

To fix this line 2437 of jdbc2/DatabaseMetaData.java needs to be
changed from:-

short seq = 0;

to:-

short seq = 1;

The same change is required in jdbc1/DatabaseMetaData.java.